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Criticism of Islam is broadly defined as criticism of the Islamic religion in its beliefs, principles, and/or any other ideas attributed to Islam.
Criticism of Islam has existed since Islam's formative stages. Early written disapprovals came from Christians and Jews as well as from some former Muslims such as Ibn al-Rawandi. Later the Muslim world itself suffered criticism. Western criticism of Islam has grown in the 21st century especially after the September 11 attacks and other terrorist incidents, over its scriptures and teachings being claimed to be a significant source of terrorism and terrorist ideology. As of 2014, about a quarter of the world's countries and territories (26%) had anti-blasphemy and (13%) had anti-apostasy laws or policies. In 2017, 13 nations, all of which were Muslim majority nations, had the death penalty for apostasy or blasphemy.
Objects of criticism include the morality of the life of Muhammad, the founder of Islam, in both his public and personal lives. Issues relating to the authenticity and morality of the scriptures of Islam, both the Quran and the hadiths, are also discussed by critics. Islam has also been viewed as a form of Arab imperialism and has received criticism by figures from Africa and India for what they perceive as the destruction of indigenous cultures. Islam's recognition of slavery as an institution, which led to Muslim traders exporting as many as 17 million slaves to the coast of the Indian Ocean, the Middle East, and North Africa, has also been criticized.
Another criticism focuses on the question of human rights in the Islamic world, both historically and in modern Islamic nations, including the treatment of women, LGBT people, and religious and ethnic minorities, as evinced in Islamic law and practice. Some commentators have made assimilationist arguments against Muslim immigration to the Western world. Similar arguments have been made in other countries in which Muslims are a minority, such as India and Russia.
The earliest surviving written criticisms of Islam are to be found in the writings of Christians who came under the early dominion of the Islamic Caliphate. One such Christian was John of Damascus (c. 676–749 AD), who was familiar with Islam and Arabic. The second chapter of his book, The Fountain of Wisdom, titled "Concerning Heresies", presents a series of discussions between Christians and Muslims. John claimed an Arian monk (who he did not know was Bahira) influenced Muhammad and viewed the Islamic doctrines as nothing more than a hodgepodge culled from the Bible. Writing on Islam's claim of Abrahamic ancestry, John explained that the Arabs were called "Saracens" (Greek Σαρακενοί, Sarakenoi) because they were "empty" (κενός, kenos, in Greek) "of Sarah". They were called "Hagarenes" because they were "the descendants of the slave-girl Hagar".
Other notable early critics of Islam included:
In the early centuries of the Islamic Caliphate, Islamic law allowed citizens to freely express their views, including criticism of Islam and religious authorities, without fear of persecution. Accordingly, there have been several notable critics and skeptics of Islam that arose from within the Islamic world itself. One eminent critic, living in the tenth and eleventh-century Syria was the blind poet Al-Ma'arri. He became well known for a poetry that was affected by a "pervasive pessimism." He labeled religions in general as "noxious weeds" and said that Islam does not have a monopoly on truth. He had particular contempt for the ulema, writing that:
They recite their sacred books, although the fact informs me that these are fiction from first to last. O Reason, thou (alone) speakest the truth. Then perish the fools who forged the religious traditions or interpreted them!
In 1280, the Jewish philosopher, Ibn Kammuna, criticized Islam in his book Examination of the Three Faiths. He reasoned that the Sharia was incompatible with the principles of justice, and that this undercut the notion of Muhammad being the perfect man: "there is no proof that Muhammad attained perfection and the ability to perfect others as claimed." The philosopher thus claimed that people converted to Islam from ulterior motives:
That is why, to this day we never see anyone converting to Islam unless in terror, or in quest of power, or to avoid heavy taxation, or to escape humiliation, or if taken prisoner, or because of infatuation with a Muslim woman, or for some similar reason. Nor do we see a respected, wealthy, and pious non-Muslim well versed in both his faith and that of Islam, going over to the Islamic faith without some of the aforementioned or similar motives.
According to Bernard Lewis, just as it is natural for a Muslim to assume that the converts to his religion are attracted by its truth, it is equally natural for the convert's former coreligionists to look for baser motives and Ibn Kammuna's list seems to cover most of such nonreligious motives.
Maimonides, one of the foremost 12th-century rabbinical arbiters and philosophers, sees the relation of Islam to Judaism as primarily theoretical. Maimonides has no quarrel with the strict monotheism of Islam, but finds fault with the practical politics of Muslim regimes. He also considered Islamic ethics and politics to be inferior to their Jewish counterparts. Maimonides criticised what he perceived as the lack of virtue in the way Muslims rule their societies and relate to one another. In his Epistle to Yemenite Jewry, he refers to Mohammad, as "hameshuga" – "that madman".
Apologetic writings, attributed to Abdullah Ibn al-Muqaffa, not only defended Manichaeism against Islam, but also criticized the Islamic concept of God. Accordingly, the Quranic deity was disregarded as an unjust, tyrannic, irrational and malevolent demonic entity, who "fights with humans and boasts about His victories" and "sitting on a throne, from which He descends". Such anthropomorphic descriptions of God were at odds with the Manichaean understanding of Divinity. Further, according to Manichaeism, it would be impossible that good and evil originate from the same source, therefore the Islamic deity could not be the true god.
Main article: Medieval Christian views on Muhammad
Early criticism came from Christian authors, many of whom viewed Islam as a Christian heresy or a form of idolatry and often explained it in apocalyptic terms. Islamic salvation optimism and its carnality was criticized by Christian writers. Islam's sensual descriptions of paradise led many Christians to conclude that Islam was not a spiritual religion, but a material one. Although sensual pleasure was also present in early Christianity, as seen in the writings of Irenaeus, the doctrines of the former Manichaean Augustine of Hippo led to broad repudiation of bodily pleasure in both life and the afterlife. Ali ibn Sahl Rabban al-Tabari defended the Quranic description of paradise by asserting that the Bible also implies such ideas, such as drinking wine in Gospel of Matthew. During the Fifth Crusade, Pope Innocent III declared that many men had been seduced by Muhammad for the pleasure of flesh.
Defamatory images of Muhammad, derived from early 7th century depictions of Byzantine Church, appear in the 14th-century epic poem Divine Comedy by Dante Alighieri. Here, Muhammad appears in the eighth circle of hell, along with Ali. Dante does not blame Islam as a whole, but accuses Muhammad of schism, by establishing another religion after Christianity. Some medieval ecclesiastical writers portrayed Muhammad as possessed by Satan, a "precursor of the Antichrist" or the Antichrist himself. The Tultusceptrum de libro domni Metobii, an Andalusian manuscript with unknown dating, shows how Muhammad (called Ozim, from Hashim) was tricked by Satan into adulterating an originally pure divine revelation. The story argues God was concerned about the spiritual fate of the Arabs and wanted to correct their deviation from the faith. He then sends an angel to the monk Osius who orders him to preach to the Arabs. Osius however is in ill-health and orders a young monk, Ozim, to carry out the angel's orders instead. Ozim sets out to follow his orders, but gets stopped by an evil angel on the way. The ignorant Ozim believes him to be the same angel that spoke to Osius before. The evil angel modifies and corrupts the original message given to Ozim by Osius, and renames Ozim Muhammad. From this followed the erroneous teachings of Islam, according to the Tultusceptrum. According to the monk Bede Muhammad was foretold in Genesis 16:12, which describes Ishmael as "a wild man" whose "hand will be against every man". Bede says about Muhammad: "Now how great is his hand against all and all hands against him; as they impose his authority upon the whole length of Africa and hold both the greater part of Asia and some of Europe, hating and opposing all."
In 1391 a dialogue was believed to have occurred between Byzantine Emperor Manuel II Palaiologos and a Persian scholar in which the Emperor stated:
Show me just what Muhammad brought that was new and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached. God is not pleased by blood – and not acting reasonably is contrary to God's nature. Faith is born of the soul, not the body. Whoever would lead someone to faith needs the ability to speak well and to reason properly, without violence and threats... To convince a reasonable soul, one does not need a strong arm, or weapons of any kind, or any other means of threatening a person with death.
Otherwise the Greek Orthodox Bishop Paul of Antioch accepts Muhammed as a prophet, but not that his mission was universal. Since the law of Christ is superior to the law of Islam, Muhammad was only ordered to the Arabs, whom a prophet was not sent yet. Denis the Carthusian wrote two treatises to refute Islam at the request of Nicholas of Cusa, Contra perfidiam Mahometi, et contra multa dicta Sarracenorum libri quattuor and Dialogus disputationis inter Christianum et Sarracenum de lege Christi et contra perfidiam Mahometi.
David Hume was critical of traditional religion and scholars generally agree that Hume was both a naturalist and a sceptic, though he considered monotheistic religions to be more "comfortable to sound reason" than polytheism and found Islam to be more "ruthless" than Christianity. In Of the Standard of Taste, an essay by Hume, the Quran is described as an "absurd performance" of a "pretended prophet" who lacked "a just sentiment of morals." Attending to the narration, Hume says, "we shall soon find, that [Muhammad] bestows praise on such instances of treachery, inhumanity, cruelty, revenge, bigotry, as are utterly incompatible with civilized society. No steady rule of right seems there to be attended to; and every action is blamed or praised, so far as it is beneficial or hurtful to the true believers."
The commonly held view in Europe during the Enlightenment was that Islam, then synonymous with the Ottoman Empire, was a bloody, ruthless and intolerant religion. In the European view, Islam lacked divine authority and regarded the sword as the route to heaven. Hume appears to represent this view in his reference to the "bloody principles" of Islam, though he also makes similar critical comments about the "bloody designs" characterizing the conflict between Catholics and Protestants during the Reformation. Many contemporary works about Islam were available to influence Hume's opinions by authors such as Isaac Barrow, Humphrey Prideaux, John Jackson, Charles Wolseley, Hugo Grotius, Paul Rycaut, Thomas Hyde, Pierre Bayle, and Blaise Pascal. The writers of this period were also influenced by George Sale who, in 1743, had translated the Quran into English.
In the early 20th century, the prevailing view among Europeans was that Islam was the root cause of Arab and Berber "backwardness". They saw Islam as an obstacle to assimilation, a view that was expressed by a writer in colonial French Algeria named André Servier. In his book, titled Islam and the Psychology of the Musulman, Servier wrote that "The only thing Arabs ever invented was their religion. And this religion is, precisely, the main obstacle between them and us". Servier describes Islam as a "religious nationalism in which every Muslim brain is steeped". According to Servier, the only reason this nationalism has not "been able to pose a threat to humanity" was that the "rigid dogma" of Islam had rendered the Arabs "incapable of fighting against the material forces placed at the disposal of Western civilization by science and progress".
The Victorian orientalist scholar Sir William Muir criticised Islam for what he perceived to be an inflexible nature, which he held responsible for stifling progress and impeding social advancement in Muslim countries. The following sentences are taken from the Rede Lecture he delivered at Cambridge in 1881:
Some, indeed, dream of an Islam in the future, rationalised and regenerate. All this has been tried already, and has miserably failed. The Koran has so encrusted the religion in a hard unyielding casement of ordinances and social laws, that if the shell be broken the life is gone. A rationalistic Islam would be Islam no longer. The contrast between our own faith and Islam is most remarkable. There are in our Scriptures living germs of truth, which accord with civil and religious liberty, and will expand with advancing civilisation. In Islam it is just the reverse. The Koran has no such teaching as with us has abolished polygamy, slavery, and arbitrary divorce, and has elevated woman to her proper place. As a Reformer, Mahomet did advance his people to a certain point, but as a Prophet he left them fixed immovably at that point for all time to come. The tree is of artificial planting. Instead of containing within itself the germ of growth and adaptation to the various requirements of time and clime and circumstance, expanding with the genial sunshine and rain from heaven, it remains the same forced and stunted thing as when first planted some twelve centuries ago."
The church historian Philip Schaff described Islam as spread by violence and fanaticism, and producing a variety of social ills in the regions it conquered.
Mohammedanism conquered the fairest portions of the earth by the sword and cursed them by polygamy, slavery, despotism and desolation. The moving power of Christian missions was love to God and man; the moving power of Islâm was fanaticism and brute force.
Schaff also described Islam as a derivative religion based on an amalgamation of "heathenism, Judaism and Christianity".
Islâm is not a new religion...[i]t is a compound or mosaic of preëxisting elements, a rude attempt to combine heathenism, Judaism and Christianity, which Mohammed found in Arabia, but in a very imperfect form.
J. M. Neale criticized Islam in terms similar to those of Schaff, arguing that it was made up of a mixture of beliefs that provided something for everyone.
...he [Muhammad] also infuses into his religion so much of each of those tenets to which the varying sects of his countrymen were addicted, as to enable each and all to please themselves by the belief that the new doctrine was only a reform of, and improvement on, that to which they had been accustomed. The Christians were conciliated by the acknowledgment of our LORD as the Greatest of Prophets; the Jews, by the respectful mention of Moses and their other Lawgivers; the idolaters, by the veneration which the Impostor professed for the Temple of Mecca, and the black stone which it contained; and the Chaldeans, by the pre-eminence which he gives to the ministrations of the Angel Gabriel, and his whole scheme of the Seven Heavens. To a people devoted to the gratification of their passions and addicted to Oriental luxury, he appealed, not unsuccessfully, by the promise of a Paradise whose sensual delights were unbounded, and the permission of a free exercise of pleasures in this world.
James Fitzjames Stephen, describing what he understood to be the Islamic conception of the ideal society, wrote the following:
Not only are the varieties of morality innumerable, but some of them are conflicting with each other. If a Mahommedan, for instance, is fully to realize his ideal, to carry out into actual fact his experiment of living, he must be one of a ruling race which has trodden the enemies of Islam under their feet, and has forced them to choose between the tribute and the sword. He must be able to put in force the law of the Koran both as to the faithful and as to unbelievers. In short, he must conquer. Englishmen come into a country where Mahommedans had more or less realized their ideal, and proceed to govern it with the most unfeigned belief in the order of ideas of which liberty is the motto.
The early 20th-century missionary James L. Barton argued that Islam's view of the sovereignty of God is so extreme and unbalanced as to produce a fatalism that stifles human initiative:
Man is reduced to a cipher. Human agency and human freedom are nullified. Right is no longer right because it is right, but because Allah wills it to be right. It is for this reason that monotheism has in Islam stifled human effort and progress. It has become a deadening doctrine of fate. Man must believe and pray, but these do not insure salvation or any benefit except Allah wills it. Why should human effort strive by sanitary means to prevent disease, when death or life depends in no way on such measures but upon the will of Allah? One reason why Moslem countries are so stagnant and backward in all that goes to make up a high civilization is owing to the deadening effects of monotheism thus interpreted. ... even in the most extreme forms of the Augustinian and Calvinistic systems there were always present in Christianity other elements which prevented the conception of the divine sovereignty from paralyzing the healthy activities of life as the Mohammedan doctrine has done.
G. K. Chesterton criticized Islam as a derivative from Christianity. He described it as a heresy or parody of Christianity. In The Everlasting Man he says:
Islam was a product of Christianity; even if it was a by-product; even if it was a bad product. It was a heresy or parody emulating and therefore imitating the Church...Islam, historically speaking, is the greatest of the Eastern heresies. It owed something to the quite isolated and unique individuality of Israel; but it owed more to Byzantium and the theological enthusiasm of Christendom. It owed something even to the Crusades.
Winston Churchill criticized what he alleged to be the effects Islam had on its believers, which he described as fanatical frenzy combined with fatalistic apathy, enslavement of women, and militant proselytizing. In his 1899 book The River War he says:
How dreadful are the curses which Mohammedanism lays on its votaries! Besides the fanatical frenzy, which is as dangerous in a man as hydrophobia in a dog, there is this fearful fatalistic apathy. The effects are apparent in many countries. Improvident habits, slovenly systems of agriculture, sluggish methods of commerce, and insecurity of property exist wherever the followers of the Prophet rule or live. A degraded sensualism deprives this life of its grace and refinement; the next of its dignity and sanctity. The fact that in Mohammedan law every woman must belong to some man as his absolute property – either as a child, a wife, or a concubine – must delay the final extinction of slavery until the faith of Islam has ceased to be a great power among men. Thousands become the brave and loyal soldiers of the faith: all know how to die but the influence of the religion paralyses the social development of those who follow it. No stronger retrograde force exists in the world. Far from being moribund, Mohammedanism is a militant and proselytizing faith. It has already spread throughout Central Africa, raising fearless warriors at every step; and were it not that Christianity is sheltered in the strong arms of science, the science against which it had vainly struggled, the civilisation of modern Europe might fall, as fell the civilisation of ancient Rome.
According to historian Warren Dockter, Churchill wrote this during a time of a fundamentalist revolt in Sudan and this statement does not reflect his full view of Islam, which were "often paradoxical and complex." He could be critical but at times "romanticized" the Islamic world; he exhibited great "respect, understanding and magnanimity." Churchill had a fascination of Islam and Islamic civilization. Winston Churchill's future sister-in-law expressed concerns about his fascination by stating, "[p]lease don't become converted to Islam; I have noticed in your disposition a tendency to orientalism." According to historian Warren Dockter, however, he "never seriously considered converting". He primarily admired its martial aspects, the "Ottoman Empire’s history of territorial expansion and military acumen", to the extent that in 1897 he wished to fight for the Ottoman Empire. According to Dockter, this was largely for his "lust for glory". Based on Churchill's letters, he seemed to regard Islam and Christianity as equals.[dead link]
During a lecture given at the University of Regensburg in 2006, Pope Benedict XVI quoted an unfavorable remark about Islam made at the end of the 14th century by Manuel II Palaiologos, the Byzantine emperor:
Show me just what Muhammad brought that was new, and there you will find things only evil and inhuman, such as his command to spread by the sword the faith he preached.
As the English translation of the Pope's lecture was disseminated across the world, many Muslim politicians and religious leaders protested against what they saw as an insulting mischaracterization of Islam. Mass street protests were mounted in many Islamic countries, the Majlis-e-Shoora (Pakistani parliament) unanimously called on the Pope to retract "this objectionable statement".
The Hindu philosopher Vivekananda commented on Islam:
Now, some Mohammedans are the crudest in this respect, and the most sectarian. Their watch-word is: "There is one God, and Mohammed is His Prophet." Everything beyond that not only is bad, but must be destroyed forthwith, at a moment’s notice, every man or woman who does not exactly believe in that must be killed; everything that does not belong to this worship must be immediately broken; every book that teaches anything else must be burnt. From the Pacific to the Atlantic, for five hundred years blood ran all over the world. That is Mohammedanism. Nevertheless, among these Mohammedans, wherever there has a philosophic man, he was sure to protest against these cruelties. In that he showed the touch of the Divine and realised a fragment of the truth; he was not playing with his religion; for it was not his father's religion he was talking, but spoke the truth direct like a man.
The more selfish a man, the more immoral he is. And so also with the race. That race which is bound down to itself has been the most cruel and the most wicked in the whole world. There has not been a religion that has clung to this dualism more than that founded by the Prophet of Arabia, and there has not been a religion, which has shed so much blood and been so cruel to other men. In the Koran there is the doctrine that a man who does not believe these teachings should be killed, it is a mercy to kill him! And the surest way to get to heaven, where there are beautiful houris and all sorts of sense enjoyments, is by killing these unbelievers. Think of the bloodshed there has been in consequence of such beliefs! 
Why religions should claim that they are not bound to abide by the standpoint of reason, no one knows. If one does not take the standard of reason, there cannot be any true judgment, even in the case of religions. One religion may ordain something very hideous. For instance, the Mohammedan religion allows Mohammedans to kill all who are not of their religion. It is clearly stated in the Koran, Kill the infidels if they do not become Mohammedans. They must be put to fire and sword. Now if we tell a Mohammedan that this is wrong, he will naturally ask, "How do you know that? How do you know it is not good? My book says it is." 
Dayanand Saraswati calls the concept of Islam to be highly offensive, and doubted that there is any connection of Islam with God:
Had the God of the Quran been the Lord of all creatures, and been Merciful and kind to all, he would never have commanded the Mohammedans to slaughter men of other faiths, and animals, etc. If he is Merciful, will he show mercy even to the sinners? If the answer be given in the affirmative, it cannot be true, because further on it is said in the Quran "Put infidels to sword," in other words, he that does not believe in the Quran and the Prophet Mohammad is an infidel (he should, therefore, be put to death). (Since the Quran sanctions such cruelty to non-Mohammedans and innocent creatures such as cows) it can never be the Word of God.
Pandit Lekh Ram regarded that Islam was grown through the violence and desire for wealth. He further asserted that Muslims deny the entire Islamic prescribed violence and atrocities, and will continue doing so. He wrote:
All educated people start looking down upon the forcible conversions and even started objecting to their very basis. Since then some naturalist Mohammadis [Muslims] are trying, rather opposing falsehood and accepting the truth, to prove unnecessarily and wrongly that Islam never indulged in Jihad and the people were never converted to Islam forcibly. Neither any temples were demolished nor were ever cows slaughtered in the temples. Women and children belonging to other religious sects were never forcibly converted to Islam nor did they ever commit any sexual acts with them as could have been done with the slave-males and females both.
Mahatma Gandhi, the moral leader of the 20th-century Indian independence movement, found the history of Muslims to be aggressive, while he claimed that Hindus have passed that stage of societal evolution:
Though, in my opinion, non violence has a predominant place in the Quran, the thirteen hundred years of imperialistic expansion has made the Muslims fighters as a body. They are therefore aggressive. Bullying is the natural excrescence of an aggressive spirit. The Hindu has an ages old civilization. He is essentially non violent. His civilization has passed through the experiences that the two recent ones are still passing through. If Hinduism was ever imperialistic in the modern sense of the term, it has outlived its imperialism and has either deliberately or as a matter of course given it up. Predominance of the non violent spirit has restricted the use of arms to a small minority which must always be subordinate to a civil power highly spiritual, learned and selfless. The Hindus as a body are therefore not equipped for fighting. But not having retained their spiritual training, they have forgotten the use of an effective substitute for arms and not knowing their use nor having an aptitude for them, they have become docile to the point of timidity and cowardice. This vice is therefore a natural excrescence of gentleness.
Jawaharlal Nehru, the first Prime Minister of India, in his book Discovery of India, describes Islam to have been a faith for military conquests. He wrote "Islam had become a more rigid faith suited more to military conquests rather than the conquests of the mind", and that Muslims brought nothing new to his country.
The Muslims who came to India from outside brought no new technique or political or economic structure. In spite of religious belief in the brotherhood of Islam, they were class bound and feudal in outlook.
Iranian writer Sadegh Hedayat regarded Islam as the corrupter of Iran, he said:
Every aspect of life and thought, including women's condition, changed after Islam. Enslaved by men, women were confined to the home. Polygamy, injection of fatalistic attitude, mourning, sorrow and grief led people to seek solace in magic, witchcraft, prayer, and supernatural beings.
Nobel prize-winning novelist V. S. Naipaul stated that Islam requires its adherents to destroy everything which is not related to it. He described it as having a:
Calamitous effect on converted peoples, to be converted you have to destroy your past, destroy your history. You have to stamp on it, you have to say 'my ancestral culture does not exist, it doesn't matter'.
Nobel prize-winning playwright Wole Soyinka stated that Islam had a role in denigrating African spiritual traditions. He criticized attempts to whitewash what he sees as the destructive and coercive history of Islam on the continent:
Let those who wish to retain or evaluate religion as a twenty-first project feel free to do so, but let it not be done as a continuation of the game of denigration against the African spiritual heritage as in a recent television series perpetrated by Islam's born again revisionist of history, Professor Ali Mazrui.
Soyinka also regarded Islam as "superstition", and said that it does not belong to Africa. He stated that it is mainly spread with violence and force.
Tatar Tengrists criticize Islam as a semitic religion, which forced Turks to submission to an alien culture. Submission and humility, two significant components of Islamic spirituality, are disregarded as major failings of Islam, not as virtues. Further, since Islam mentions semitic history as if it were the history of all mankind, but disregards components of other cultures and spirituality, the international approach of Islam is seen as a threat. It additionally gives Imams an opportunity to march against their own people under the banner of international Islam.
Mustafa Kemal Atatürk, founder of the Turkish Republic, described Islam as the religion of the Arabs in his own work titled Vatandaş için Medeni Bilgiler by his own critical and nationalist views:
Even before accepting the religion of the Arabs, the Turks were a great nation. After accepting the religion of the Arabs, this religion, didn't effect to combine the Arabs, the Persians and Egyptians with the Turks to constitute a nation. (This religion) rather, loosened the national nexus of Turkish nation, got national excitement numb. This was very natural. Because the purpose of the religion founded by Muhammad, over all nations, was to drag to an including Arab national politics.
Sami Aldeeb, Palestinian-born Swiss lawyer and author of many books and articles on Arab and Islamic law, expressed various positions critical of Islam, for example, he positioned himself for a ban on the erection of minarets in Switzerland, since in his opinion the constitution allows prayer, but not shouting. He wants the worldly struggle for human rights, is against male and female circumcision, ritual slaughter, religious cemeteries, the death penalty and, in principle, the use of force. He holds the theory that the Quran was written by a rabbi.
Originality of Quranic manuscripts. According to traditional Islamic scholarship, all of the Quran was written down by Muhammad's companions while he was alive (during 610–632 CE), but it was primarily an orally related document. The written compilation of the whole Quran in its definite form as we have it now was not completed until many years after the death of Muhammad. John Wansbrough, Patricia Crone and Yehuda D. Nevo argue that all the primary sources which exist are from 150 to 300 years after the events which they describe, and thus are chronologically far removed from those events.
Imperfections in the Quran. Critics reject the idea that the Quran is miraculously perfect and impossible to imitate as asserted in the Quran itself. The 1901–1906 Jewish Encyclopedia, for example, writes: "The language of the Koran is held by the Mohammedans to be a peerless model of perfection. Critics, however, argue that peculiarities can be found in the text. For example, critics note that a sentence in which something is said concerning Allah is sometimes followed immediately by another in which Allah is the speaker (examples of this are suras xvi. 81, xxvii. 61, xxxi. 9, and xliii. 10). Many peculiarities in the positions of words are due to the necessities of rhyme (lxix. 31, lxxiv. 3), while the use of many rare words and new forms may be traced to the same cause (comp. especially xix. 8, 9, 11, 16)."
Judaism and the Quran. According to the Jewish Encyclopedia, "The dependence of Mohammed upon his Jewish teachers or upon what he heard of the Jewish Haggadah and Jewish practices is now generally conceded." John Wansbrough believes that the Quran is a redaction in part of other sacred scriptures, in particular the Judaeo-Christian scriptures. Herbert Berg writes that "Despite John Wansbrough's very cautious and careful inclusion of qualifications such as "conjectural," and "tentative and emphatically provisional", his work is condemned by some. Some of this negative reaction is undoubtedly due to its radicalness...Wansbrough's work has been embraced wholeheartedly by few and has been employed in a piecemeal fashion by many. Many praise his insights and methods, if not all of his conclusions." Early jurists and theologians of Islam mentioned some Jewish influence but they also say where it is seen and recognized as such, it is perceived as a debasement or a dilution of the authentic message. Bernard Lewis describes this as "something like what in Christian history was called a Judaizing heresy." According to Moshe Sharon, the story of Muhammad having Jewish teachers is a legend developed in the 10th century CE. Philip Schaff described the Quran as having "many passages of poetic beauty, religious fervor, and wise counsel, but mixed with absurdities, bombast, unmeaning images, low sensuality."
Mohammed and God as speakers. According to Ibn Warraq, the Iranian rationalist Ali Dashti criticized the Quran on the basis that for some passages, "the speaker cannot have been God." Warraq gives Surah Al-Fatiha as an example of a passage which is "clearly addressed to God, in the form of a prayer." He says that by only adding the word "say" in front of the passage, this difficulty could have been removed. Furthermore, it is also known that one of the companions of Muhammad, Ibn Masud, rejected Surah Fatihah as being part of the Quran; these kind of disagreements are, in fact, common among the companions of Muhammad who could not decide which surahs were part of the Quran and which not.
Critics point to various pre-existing sources to argue against the traditional narrative of revelation from God. Some scholars have calculated that one third of the Quran has pre-Islamic Christian origins. Aside from the Bible, the Quran relies on several Apocryphal and legendary sources, like the Protoevangelium of James, Gospel of Pseudo-Matthew, and several infancy gospels. Several narratives rely on Jewish Midrash Tanhuma legends, like the narrative of Cain learning to bury the body of Abel in Quran 5:31. Norman Geisler argues that the dependence of the Quran on preexisting sources is one evidence of a purely human origin. Richard Carrier regards this reliance on pre-Islamic Christian sources as evidence that Islam derived from a Torah-observant sect of Christianity.
Main article: Criticism of Hadith
Hadith are Muslim traditions relating to the Sunnah (words and deeds) of Muhammad. They are drawn from the writings of scholars writing between 844 and 874 CE, more than 200 years after the death of Mohammed in 632 CE. Within Islam, different schools and sects have different opinions on the proper selection and use of Hadith. The four schools of Sunni Islam all consider Hadith second only to the Quran, although they differ on how much freedom of interpretation should be allowed to legal scholars. Shi'i scholars disagree with Sunni scholars as to which Hadith should be considered reliable. The Shi'as accept the Sunnah of Ali and the Imams as authoritative in addition to the Sunnah of Muhammad, and as a consequence they maintain their own, different, collections of Hadith.
It has been suggested that there exists around the Hadith three major sources of corruption: political conflicts, sectarian prejudice, and the desire to translate the underlying meaning, rather than the original words verbatim.
Muslim critics of the hadith, Quranists, reject the authority of hadith on theological grounds, pointing to verses in the Quran itself: "Nothing have We omitted from the Book", declaring that all necessary instruction can be found within the Quran, without reference to the Hadith. They claim that following the Hadith has led to people straying from the original purpose of God's revelation to Muhammad, adherence to the Quran alone. Ghulam Ahmed Pervez (1903–1985) was a noted critic of the Hadith and believed that the Quran alone was all that was necessary to discern God's will and our obligations. A fatwa, ruling, signed by more than a thousand orthodox clerics, denounced him as a 'kafir', a non-believer. His seminal work, Maqam-e Hadith argued that the Hadith were composed of "the garbled words of previous centuries", but suggests that he is not against the idea of collected sayings of the Prophet, only that he would consider any hadith that goes against the teachings of Quran to have been falsely attributed to the Prophet. The 1986 Malaysian book "Hadith: A Re-evaluation" by Kassim Ahmad was met with controversy and some scholars declared him an apostate from Islam for suggesting that ""the hadith are sectarian, anti-science, anti-reason and anti-women."
John Esposito notes that "Modern Western scholarship has seriously questioned the historicity and authenticity of the hadith", maintaining that "the bulk of traditions attributed to the Prophet Muhammad were actually written much later." He mentions Joseph Schacht, considered the father of the revisionist movement, as one scholar who argues this, claiming that Schacht "found no evidence of legal traditions before 722," from which Schacht concluded that "the Sunna of the Prophet is not the words and deeds of the Prophet, but apocryphal material" dating from later. Other scholars, however, such as Wilferd Madelung, have argued that "wholesale rejection as late fiction is unjustified".
Orthodox Muslims do not deny the existence of false hadith, but believe that through the scholars' work, these false hadith have been largely eliminated.
See also: Historiography of early Islam
The traditional view of Islam has also been criticised for the lack of supporting evidence consistent with that view, such as the lack of archaeological evidence, and discrepancies with non-Muslim literary sources. In the 1970s, what has been described as a "wave of sceptical scholars" challenged a great deal of the received wisdom in Islamic studies.:23 They argued that the Islamic historical tradition had been greatly corrupted in transmission. They tried to correct or reconstruct the early history of Islam from other, presumably more reliable, sources such as coins, inscriptions, and non-Islamic sources. The oldest of this group was John Wansbrough (1928–2002). Wansbrough's works were widely noted, but perhaps not widely read.:38
In 1972 a cache of ancient Qurans in a mosque in Sana'a, Yemen was discovered – commonly known as the Sana'a manuscripts. The German scholar Gerd R. Puin has been investigating these Quran fragments for years. His research team made 35,000 microfilm photographs of the manuscripts, which he dated to early part of the 8th century. Puin has not published the entirety of his work, but noted unconventional verse orderings, minor textual variations, and rare styles of orthography. He also suggested that some of the parchments were palimpsests which had been reused. Puin believed that this implied a text that changed over time as opposed to one that remained the same.
Kaaba is the most sacred site in Islam. Criticism has centered on the origins of the Kaaba. In her book, Islam: A Short History, Karen Armstrong asserts that the Kaaba was officially dedicated to Hubal, a Nabatean deity, and contained 360 idols that probably represented the days of the year. Imoti contends that there were numerous such Kaaba sanctuaries in Arabia at one time, but this was the only one built of stone. The others also allegedly had counterparts of the Black Stone. There was a "red stone", the deity of the south Arabian city of Ghaiman, and the "white stone" in the Kaaba of al-Abalat (near the city of Tabala, south of Mecca). Grunebaum in Classical Islam points out that the experience of divinity of that period was often associated with stone fetishes, mountains, special rock formations, or "trees of strange growth."
According to Sarwar, about 400 years before the birth of Muhammad, a man named "Amr bin Lahyo bin Harath bin Amr ul-Qais bin Thalaba bin Azd bin Khalan bin Babalyun bin Saba", who was descended from Qahtan and was the king of Hijaz had placed a Hubal idol onto the roof of the Kaaba. This idol was one of the chief deities of the ruling tribe Quraysh. The idol was made of red agate and shaped like a human, but with the right hand broken off and replaced with a golden hand. When the idol was moved inside the Kaaba, it had seven arrows in front of it, which were used for divination. According to the Encyclopædia Britannica, "before the rise of Islam it was revered as a sacred sanctuary and was a site of pilgrimage." Many Muslim and academic historians stress the power and importance of the pre-Islamic Mecca. They depict it as a city grown rich on the proceeds of the spice trade. Patricia Crone believes that this is an exaggeration and that Mecca may only have been an outpost trading with nomads for leather, cloth, and camel butter. Crone argues that if Mecca had been a well-known center of trade, it would have been mentioned by later authors such as Procopius, Nonnosus, or the Syrian church chroniclers writing in Syriac. The town is absent, however, from any geographies or histories written in the three centuries before the rise of Islam.
Main article: Criticism of Muhammad
Muhammad is considered as one of the prophets in Islam and as a model for followers. Critics such as Sigismund Koelle and former Muslim Ibn Warraq see some of Muhammad's actions as immoral.
Ka'b ibn al-Ashraf wrote a poetic eulogy commemorating the slain Quraish notables; later, he had traveled to Mecca and provoked the Quraish to fight Muhammad. He also wrote erotic poetry about Muslim women, which offended the Muslims there. This poetry influenced so many that this too was considered directly against the Constitution of Medina which states, loyalty gives protection against treachery and this document will not (be employed to) protect one who is unjust or commits a crime. Other sources also state that he was plotting to assassinate Muhammad. Muhammad called upon his followers to kill Ka'b. Muhammad ibn Maslama offered his services, collecting four others. By pretending to have turned against Muhammad, Muhammad ibn Maslama and the others enticed Ka'b out of his fortress on a moonlit night, and killed him in spite of his vigorous resistance. The Jews were terrified at his assassination, and as the historian Ibn Ishaq put it "...there was not a Jew who did not fear for his life".
According to scriptural Sunni's Hadith sources, Aisha was six or seven years old when she was married to Muhammad and nine when the marriage was consummated.[full citation needed][full citation needed][full citation needed]
Muhammad ibn Jarir al-Tabari, born in Persia 200 years after Muhammmad's death, suggested that she was ten years old. Six hundred years after Muhammad, Ibn Khallikan recorded that she was nine years old at marriage, and twelve at consummation. Ibn Sa'd al-Baghdadi, born about 150 years after Muhammad's death, cited Hisham ibn Urwah as saying that she was nine years old at marriage, and twelve at consummation, but Hisham ibn Urwah's original source is otherwise unknown, and Ibn Sa'd al-Baghdadi's work does not have the high religious status of the Hadith.
In the twentieth century, Indian writer Muhammad Ali challenged the Hadith showing that Aisha was not as young as the traditional sources claim, arguing that instead, a new interpretation of the Hadith compiled by Mishkat al-Masabih, Wali-ud-Din Muhammad ibn Abdullah Al-Khatib, could indicate that Aisha would have been nineteen years old around the time of her marriage.
Colin Turner, a UK professor of Islamic studies, states that since such marriages between an older man and a young girl were customary among the Bedouins, Muhammad's marriage would not have been considered improper by his contemporaries. Karen Armstrong, the British author on comparative religion, has affirmed that "There was no impropriety in Muhammad's marriage to Aisha. Marriages conducted in absentia to seal an alliance were often contracted at this time between adults and minors who were even younger than Aisha."
According to some critics, the morality of the Quran appears to be a moral regression when judged by the standards of the moral traditions of Judaism and Christianity it says that it builds upon. The Catholic Encyclopedia, for example, states that "the ethics of Islam are far inferior to those of Judaism and even more inferior to those of the New Testament" and "that in the ethics of Islam there is a great deal to admire and to approve, is beyond dispute; but of originality or superiority, there is none."
In The End of Faith Harris argues that Muslim extremism is simply a consequence of taking the Quran literally, and is skeptical that moderate Islam is possible. Various calls to arms were identified in the Quran by US citizen Mohammed Reza Taheri-azar, all of which were cited as "most relevant to my actions on March 3, 2006" (Q9:44, 9:19, 57:10–11, 8:72–73, 9:120, 3:167–75, 4:66, 4:104, 9:81,  9:93–94, 9:100, 16:110, 61:11–12, 47:35). 
Henry Martyn claims that the concept of the Houris was chosen to satisfy Muhammad's followers.
Bernard Lewis writes: "In one of the sad paradoxes of human history, it was the humanitarian reforms brought by Islam that resulted in a vast development of the slave trade inside, and still more outside, the Islamic empire." He notes that the Islamic injunctions against the enslavement of Muslims led to massive importation of slaves from the outside. According to Patrick Manning, Islam by recognizing and codifying the slavery seems to have done more to protect and expand slavery than the reverse.
According to Brockopp, on the other hand, the idea of using alms for the manumission of slaves appears to be unique to the Quran, assuming the traditional interpretation of verses [Quran 2:177] and [Quran 9:60]. Similarly, the practice of freeing slaves in atonement for certain sins appears to be introduced by the Quran (but compare Exod 21:26-7). The forced prostitution of female slaves, a Near Eastern custom of great antiquity, is condemned in the Quran.  Murray Gordon notes that this ban is "of no small significance." Brockopp writes: "Other cultures limit a master's right to harm a slave but few exhort masters to treat their slaves kindly, and the placement of slaves in the same category as other weak members of society who deserve protection is unknown outside the Qur'an. The unique contribution of the Qur'an, then, is to be found in its emphasis on the place of slaves in society and society's responsibility toward the slave, perhaps the most progressive legislation on slavery in its time."
Critics argue unlike Western societies which in their opposition to slavery spawned anti-slavery movements whose numbers and enthusiasm often grew out of church groups, no such grass-roots organizations ever developed in Muslim societies. In Muslim politics the state unquestioningly accepted the teachings of Islam and applied them as law. Islam, by sanctioning slavery, also extended legitimacy to the traffic in slaves.
According to Maurice Middleberg, however, "Sura 90 in the Quran states that the righteous path involves 'the freeing of slaves.'" Murray Gordon characterizes Muhammad's approach to slavery as reformist rather than revolutionary. He did not set out to abolish slavery, but rather to improve the conditions of slaves by urging his followers to treat their slaves humanely and free them as a way of expiating one's sins which some modern Muslim authors have interpreted as indication that Muhammad envisioned a gradual abolition of slavery.
Critics say it was only in the early 20th century (post World War I) that slavery gradually became outlawed and suppressed in Muslim lands, largely due to pressure exerted by Western nations such as Britain and France. Gordon describes the lack of homegrown Islamic abolition movements as owing much to the fact that it was deeply anchored in Islamic law. By legitimizing slavery and – by extension – traffic in slaves, Islam elevated those practices to an unassailable moral plane. As a result, in no part of the Muslim world was an ideological challenge ever mounted against slavery. The political and social system in Muslim society would have taken a dim view of such a challenge.
However, In Islamic jurisprudence, slavery was theoretically an exceptional condition under the dictum The basic principle is liberty (al-'asl huwa 'l-hurriya), so that for a foundling or another person whose status was unknown freedom was presumed and enslavement forbidden.
The issue of slavery in the Islamic world in modern times is controversial. Critics argue there is hard evidence of its existence and destructive effects. Others maintain slavery in central Islamic lands has been virtually extinct since mid-twentieth century, and that reports from Sudan and Somalia showing practice of slavery is in border areas as a result of continuing war and not Islamic belief. In recent years, according to some scholars, there has been a "worrying trend" of "reopening" of the issue of slavery by some conservative Salafi Islamic scholars after its "closing" earlier in the 20th century when Muslim countries banned slavery and "most Muslim scholars" found the practice "inconsistent with Qur'anic morality."
Shaykh Fadhlalla Haeri of Karbala expressed the view in 1993 that the enforcement of servitude can occur but is restricted to war captives and those born of slaves.
In a 2014 issue of their digital magazine Dabiq, the Islamic State of Iraq and the Levant explicitly claimed religious justification for enslaving Yazidi women.
Main article: Apostasy in Islam
See also: Freedom of religion § Islam
According to Islamic law apostasy is identified by a list of actions such as conversion to another religion, denying the existence of God, rejecting the prophets, mocking God or the prophets, idol worship, rejecting the sharia, or permitting behavior that is forbidden by the sharia, such as adultery or the eating of forbidden foods or drinking of alcoholic beverages. The majority of Muslim scholars hold to the traditional view that apostasy is punishable by death or imprisonment until repentance, at least for adult men of sound mind.
The kind of apostasy which the jurists generally deemed punishable was of the political kind, although there were considerable legal differences of opinion on this matter. Wael Hallaq states that "[in] a culture whose lynchpin is religion, religious principles and religious morality, apostasy is in some way equivalent to high treason in the modern nation-state".
Laws prohibiting religious conversion run contrary to Article 18 of the Universal Declaration of Human Rights, which states that "[e]veryone has the right to freedom of thought, conscience and religion; this right includes freedom to change his religion or belief, and freedom, either alone or in community with others and in public or private, to manifest his religion or belief in teaching, practice, worship and observance." The English historian C. E. Bosworth suggests the traditional view of apostasy hampered the development of Islamic learning, arguing that while the organizational form of the Christian university allowed them to develop and flourish into the modern university, "the Muslim ones remained constricted by the doctrine of waqf alone, with their physical plant often deteriorating hopelessly and their curricula narrowed by the exclusion of the non-traditional religious sciences like philosophy and natural science," out of fear that these could evolve into potential toe-holds for kufr, those people who reject God."
At a 2009 human rights conference at Mofid University in Qom, Araki stated that "if an individual doubts Islam, he does not become the subject of punishment, but if the doubt is openly expressed, this is not permissible." As one observer (Sadakat Kadri) noted, this "freedom" has the advantage that "state officials could not punish an unmanifested belief even if they wanted to".
In 13 Muslim-majority countries atheism is punishable by death. However, according to legal historian Sadakat Kadri, while apostasy was traditionally punished by death, executions were rare because "it was widely believed" that any accused apostate "who repented by articulating the shahada" (LA ILAHA ILLALLAH "There is no God but God") "had to be forgiven" and their punishment delayed until after Judgement Day. This principle was upheld "even in extreme situations", such as when an offender adopts Islam "only for fear of death", based on the hadith that Muhammad had upbraided a follower for killing a raider who had uttered the shahada.
See also: Sharia
Bernard Lewis summarizes:
The penalty for apostasy in Islamic law is death. Islam is conceived as a polity, not just as a religious community. It follows therefore that apostasy is treason. It is a withdrawal, a denial of allegiance as well as of religious belief and loyalty. Any sustained and principled opposition to the existing regime or order almost inevitably involves such a withdrawal.
The four Sunni schools of Islamic jurisprudence, as well as Shi'a scholars, agree on the difference of punishment between male and female. A sane adult male apostate may be executed. A female apostate may be put to death, according to the majority view, or imprisoned until she repents, according to others.
The Quran threatens apostates with punishment in the next world only, the historian W. Heffening states, the traditions however contain the element of death penalty. Muslim scholar Shafi'i interprets verse Quran 2:217  as adducing the main evidence for the death penalty in Quran. The historian Wael Hallaq states the later addition of death penalty "reflects a later reality and does not stand in accord with the deeds of the Prophet." He further states that "nothing in the law governing apostate and apostasy derives from the letter of the holy text."
William Montgomery Watt, in response to a question about Western views of the Islamic Law as being cruel, states that "In Islamic teaching, such penalties may have been suitable for the age in which Muhammad lived. However, as societies have since progressed and become more peaceful and ordered, they are not suitable any longer."
Some contemporary Islamic jurists from both the Sunni and Shia denominations together with Quran only Muslims have argued or issued fatwas that state that either the changing of religion is not punishable or is only punishable under restricted circumstances. For example, Grand Ayatollah Hussein-Ali Montazeri argues that no Quranic verse prescribes an earthly penalty for apostasy and adds that it is not improbable that the punishment was prescribed by Muhammad at early Islam due to political conspiracies against Islam and Muslims and not only because of changing the belief or expressing it. Montazeri defines different types of apostasy. He does not hold that a reversion of belief because of investigation and research is punishable by death but prescribes capital punishment for a desertion of Islam out of malice and enmity towards the Muslim.
According to Yohanan Friedmann, an Israeli Islamic Studies scholar, a Muslim may stress tolerant elements of Islam (by for instance adopting the broadest interpretation of Quran 2:256 ("No compulsion is there in religion...") or the humanist approach attributed to Ibrahim al-Nakha'i), without necessarily denying the existence of other ideas in the Medieval Islamic tradition but rather discussing them in their historical context (by for example arguing that "civilizations comparable with the Islamic one, such as the Sassanids and the Byzantines, also punished apostasy with death. Similarly neither Judaism nor Christianity treated apostasy and apostates with any particular kindness"). Friedmann continues:
The real predicament facing modern Muslims with liberal convictions is not the existence of stern laws against apostasy in medieval Muslim books of law, but rather the fact that accusations of apostasy and demands to punish it are heard time and again from radical elements in the contemporary Islamic world.
See also: Human rights
Some widely held interpretations of Islam are inconsistent with Human Rights conventions that recognize the right to change religion. In particular article 18 of the Universal Declaration of Human Rights states:
Everyone has the right to freedom of thought, conscience and religion; this right includes freedom to change his religion or belief, and freedom, either alone or in community with others and in public or private, to manifest his religion or belief in teaching, practice, worship and observance.
To implement this, Article 18 (2) of the International Covenant on Civil and Political Rights states:
No one shall be subject to coercion which would impair his freedom to have or to adopt a religion of his choice.
The right for Muslims to change their religion is not afforded by the Iranian Shari'ah law, which specifically forbids it. In 1981, the Iranian representative to the United Nations, Said Rajaie-Khorassani, articulated the position of his country regarding the Universal Declaration of Human Rights, by saying that the UDHR was "a secular understanding of the Judeo-Christian tradition", which could not be implemented by Muslims without trespassing the Islamic law. As a matter of law, on the basis of its obligations as a state party to the ICCPR, Iran is obliged to uphold the right of individuals to practice the religion of their choice and to change religions, including converting from Islam. The prosecution of converts from Islam on the basis of religious edicts that identify apostasy as an offense punishable by death is clearly at variance with this obligation. Muslim countries such as Sudan and Saudi Arabia, have the death penalty for apostasy from Islam. These countries have criticized the Universal Declaration of Human Rights for its perceived failure to take into account the cultural and religious context of non-Western countries. In 1990, the Organisation of Islamic Cooperation published a separate Cairo Declaration on Human Rights in Islam compliant with Shari'ah. Although granting many of the rights in the UN declaration, it does not grant Muslims the right to convert to other religions, and restricts freedom of speech to those expressions of it that are not in contravention of the Islamic law.
Abul Ala Maududi, the founder of Jamaat-e-Islami, wrote a book called Human Rights in Islam, in which he argues that respect for human rights has always been enshrined in Sharia law (indeed that the roots of these rights are to be found in Islamic doctrine) and criticizes Western notions that there is an inherent contradiction between the two. Western scholars have, for the most part, rejected Maududi's analysis.
Main article: Islam and violence
The September 11 attacks on the United States, and various other acts of Islamic terrorism over the 21st century, have resulted in many non-Muslims' indictment of Islam as a violent religion. In particular, the Quran's teachings on matters of war and peace have become topics of heated discussion in recent years. On the one hand, some critics claim that certain verses of the Quran sanction military action against unbelievers as a whole both during the lifetime of Muhammad and after. The Quran says, "Fight in the name of your religion with those who fight against you." On the other hand, most Muslim scholars, including Ahmadiyya, argue that such verses of the Quran are interpreted out of context, and argue that when the verses are read in context it clearly appears that the Quran prohibits aggression, and allows fighting only in self-defense.
Orientalist David Margoliouth described the Battle of Khaybar as the "stage at which Islam became a menace to the whole world." According to Margoliouth, earlier attacks on the Meccans and the Jewish tribes of Medina (e.g., the invasion of Banu Qurayza) could be at least plausibly be ascribed to wrongs done to Muhammad or the Islamic community. Margoliouth argues that the Jews of Khaybar had done nothing to harm Muhammad or his followers, and ascribes the attack to a desire for plunder.
Montgomery Watt mentions another reason for the battle. He believes Jews' intriguing and use of their wealth to incite tribes against Muhammad left him no choice but to attack. Vaglieri concurs that one reason for attack was that the Jews of Khaybar were responsible for the Confederates that attacked Muslims during the Battle of the Trench. Shibli Numani also sees Khaybar's actions during the Battle of the Trench, and draws particular attention to Banu Nadir's leader Huyayy ibn Akhtab, who had gone to the Banu Qurayza during the battle to instigate them to attack Muhammad.
Jihad, an Islamic term, is a religious duty of Muslims. In Arabic, the word jihād translates as a noun meaning "struggle". Jihad appears 41 times in the Quran and frequently in the idiomatic expression "striving for the sake of God (al-jihad fi sabil Allah)". Jihad is an important religious duty for several sects in Islam. A minority among the Sunni scholars sometimes refer to this duty as the sixth pillar of Islam, though it occupies no such official status. In Twelver Shi'a Islam, however, Jihad is one of the 10 Practices of the Religion. The Quran calls repeatedly for jihad, or holy struggle, resistance, against unbelievers, including, at times, Jews and Christians. Middle East historian Bernard Lewis argues that "the overwhelming majority of classical theologians, jurists, and traditionalists (specialists in the hadith) understood the obligation of jihad in a military sense." Furthermore, Lewis maintains that for most of the recorded history of Islam, from the lifetime of Muhammad onward, the word jihad was used in a primarily military sense.
The Quran: (8:12): "...cast terror in their hearts and strike upon their necks." The phrase that they have been "commanded to terrorize the disbelievers" has been cited in motivation of Jihadi terror. One Jihadi cleric has said:
Another aim and objective of jihad is to drive terror in the hearts of the [infidels]. To terrorize them. Did you know that we were commanded in the Qur'an with terrorism? ...Allah said, and prepare for them to the best of your ability with power, and with horses of war. To drive terror in the hearts of my enemies, Allah's enemies, and your enemies. And other enemies which you don't know, only Allah knows them... So we were commanded to drive terror into the hearts of the [infidels], to prepare for them with the best of our abilities with power. Then the Prophet said, nay, the power is your ability to shoot. The power which you are commanded with here, is your ability to shoot. Another aim and objective of jihad is to kill the [infidels], to lessen the population of the [infidels]... it is not right for a Prophet to have captives until he makes the Earth warm with blood... so, you should always seek to lessen the population of the [infidels].
David Cook, author of Understanding Jihad, said "In reading Muslim literature – both contemporary and classical – one can see that the evidence for the primacy of spiritual jihad is negligible. Today it is certain that no Muslim, writing in a non- Western language (such as Arabic, Persian, Urdu), would ever make claims that jihad is primarily nonviolent or has been superseded by the spiritual jihad. Such claims are made solely by Western scholars, primarily those who study Sufism and/or work in interfaith dialogue, and by Muslim apologists who are trying to present Islam in the most innocuous manner possible." Cook argued that "Presentations along these lines are ideological in tone and should be discounted for their bias and deliberate ignorance of the subject" and that "[i]t is no longer acceptable for Western scholars or Muslim apologists writing in non-Muslim languages to make flat, unsupported statements concerning the prevalence – either from a historical point of view or within contemporary Islam—of the spiritual jihad." Magdi Allam, an outspoken Egyptian-born Italian journalist, has described Islam as intrinsically violent and characterized by "hate and intolerance".
According to Fawzy Abdelmalek, "many Muslim scholars speak of Islam as a religion of peace and not of violence. They say that the non-Muslims misunderstand the Quran verses about Jihad and the conduct of war in Islam."
Dennis Prager, columnist and author, in responding to a movement that contends that Islam is "a religion of peace," wrote: "Now, Islam has never been a religion of peace. It began as a warlike religion and throughout its history, whenever possible, made war on non-Muslims – from the polytheists of North Africa to the Hindus of India, about 60 to 80 million of whom Muslims killed during their thousand-year rule there." John R. Neuman, a scholar on religion, describes Islam as "a perfect anti-religion" and "the antithesis of Buddhism."
Charles Mathewes characterizes the peace verses as saying that "if others want peace, you can accept them as peaceful even if they are not Muslim." As an example, Mathewes cites the second sura, which commands believers not to transgress limits in warfare: "fight in God's cause against those who fight you, but do not transgress limits [in aggression]; God does not love transgressors" (2:190).
Lawrence Wright, author of a Pulitzer-prize-winning book, argued that role of Wahhabi literature in Saudi schools contributing suspicion and hate violence against non-Muslims as non-believers or infidels and anyone who "disagrees with Wahhabism is either an infidel or a deviant, who should repent or be killed." Andrew Bostom states that a number of jihads have targeted Christians, Hindus, and Jews.
Further information: Beheading in Islam
Beheading was a standard method of execution in pre-modern Islamic law. Though a formerly widespread execution method, its use had been abandoned in most countries by the end of the 20th century. Currently, it is used only in Saudi Arabia. It also remains a legal method of execution in Iran, Qatar and Yemen, where it is no longer in use.
Critics also claim that Muhammad beheaded 600 Jewish men and boys (Abu Dawud 4390, Quran 33:26, Q8:55–58, Sahih al-Bukhari 5:59:447, Sahih al-Bukhari 5:58:148, Ibn Kathir V.3. P.170, Ibn Ishaq p.464).) 
Main article: LGBT topics and Islam
Critics such as lesbian activist Irshad Manji, former Muslims Ehsan Jami and the former Dutch politician Ayaan Hirsi Ali, have criticized Islam's attitudes towards homosexuals. Most international human rights organizations, such as Human Rights Watch and Amnesty International, condemn Islamic laws that make homosexual relations between consenting adults a crime. Since 1994 the United Nations Human Rights Committee has also ruled that such laws violated the right to privacy guaranteed in the Universal Declaration of Human Rights and the International Covenant on Civil and Political Rights.
In May 2008, the sexual rights lobby group Lambda Istanbul (based in Istanbul, Turkey) was banned by court order for violating a constitutional provision on the protection of the family and an article banning bodies with objectives that violate law and morality. This decision was then taken to the Court of Cassation and the ban lifted.
In 10 Muslim-majority countries homosexual acts may be punishable by death, though in some the punishment has never been carried out.
The ex-Muslim Ibn Warraq states that the Quran's condemnation of homosexuality has frequently been ignored in practice, and that Islamic countries were much more tolerant of homosexuality than Christian ones until fairly recently.
Main article: Nikah mut‘ah
Nikāḥ al-Mutʿah (Arabic: نكاح المتعة literally pleasure marriage) is a fixed-term or short-term contractual marriage in Shia Islam. The duration of this type of marriage is fixed at its inception and is then automatically dissolved upon completion of its term. For this reason, nikah mut‘ah has been widely criticised as the religious cover and legalization of prostitution. The Christian missionary Thomas Patrick Hughes criticized Mut'ah as allowing the continuation of "one of the abominable practices of ancient Arabia." Shi'a and Sunnis agree that Mut'ah was legal in early times, but Sunnis consider that it was abrogated. Ibn Kathir writes that "[t]here's no doubt that in the outset of Islam, Mut'ah was allowed under the Shari'ah". Currently, however, mut'ah is one of the distinctive features of Ja'fari jurisprudence. No other school of Islamic jurisprudence allows it. According to Imam Jafar as Sadiq, "One of the matters about which I shall never keep precautionary silence (taqiyya) is the matter of mu’tah." Allameh Tabatabaei defends the Shia view in Tafsir al-Mizan, arguing that there are mutawatir or nearly mutawatir traditions narrated from the Shia Imams that Mut'ah is permitted. For example, it has been narrated from Muhammad al-Baqir and Ja'far al-Sadiq that they said "regarding the [above] verse, and there is no blame on you about what you mutually agree after what is appointed." It means that he increases her dowry or she increases his (fixed) period.
Sunnis believe that Muhammad later abolished this type of marriage at several different large events, the most accepted being at Khaybar in 7 AH (629 CE) Bukhari 059.527 and at the Victory of Mecca in 8 AH (630 CE). Most Sunnis believe that Umar later was merely enforcing a prohibition that was established during Muhammad's time. Shia contest the criticism that nikah mut‘ah is a cover for prostitution, and argue that the unique legal nature of temporary marriage distinguishes Mut'ah ideologically from prostitution. Children born of temporary marriages are considered legitimate, and have equal status in law with their siblings born of permanent marriages, and do inherit from both parents. Women must observe a period of celibacy (idda) to allow for the identification of a child's legitimate father, and a woman can only be married to one person at a time, be it temporary or permanent. Some Shia scholars also view Mut'ah as a means of eradicating prostitution from society.
Main article: Nikah Misyar
Nikah Misyar (Arabic: المسيار) is a type of Nikah (marriage) in Sunni Islam only carried out through the normal contractual procedure, with the provision that the husband and wife give up several rights by their own free will, such as living together, equal division of nights between wives in cases of polygamy, the wife's rights to housing, and maintenance money ("nafaqa"), and the husband's right of homekeeping and access. Essentially the couple continue to live separately from each other, as before their contract, and see each other to fulfil their needs in a legally permissible (halal) manner when they please. Misyar has been suggested by some western authors to be a comparable marriage with Nikah mut'ah and that they find it for the sole purpose of "sexual gratification in a licit manner" According to Florian Pohl, assistant professor of religion at Oxford College, Misyar marriage is a controversial issue in the Muslim world, as many see it as practice that encourages marriages for purely sexual purposes, or that it is used as a cover for a form of prostitutuion.
Professor Yusuf Al-Qaradawi observes that he does not promote this type of marriage, although he has to recognise that it is legal, since it fulfils all the requirements of the usual marriage contract. He states his preference that the clause of renunciation be not included within the marriage contract, but be the subject of a simple verbal agreement between the parties. Islamic scholars like Ibn Uthaimeen or Al-Albani claim, for their part, that misyar marriage may be legal, but not moral. They agree that the wife can at any time, reclaim the rights which she gave up at the time of contract. But, they are opposed to this type of marriage on the grounds that it contradicts the spirit of the Islamic law of marriage and that it has perverse effects on the woman, the family and the community in general.
For Al-Albani, misyar marriage may even be considered as illicit, because it runs counter to the objectives and the spirit of marriage in Islam, as described in the Quran: "And among His signs is this, that He created for you mates from among yourselves, that ye may dwell in tranquility with them, and He has put love and mercy between your (hearts)…" Al-Albani also underlines the social problems which result from the "misyar" marriage, particularly in the event that children are born from this union. The children raised by their mother in a home from which the father is always absent, without reason, may suffer difficulties. The situation becomes even worse if the wife is abandoned or repudiated by her husband "misyar", with no means of subsistence, as usually happens.
Ibn Uthaymeen recognized the legality of "misyar" marriage under Shariah, but came to oppose it due to what he considered to be its harmful effects.
Main article: Women in Islam
Main article: Islam and domestic violence
Many scholars claim Shari'a law encourages domestic violence against women, when a husband suspects nushuz (disobedience, disloyalty, rebellion, ill conduct) in his wife.
One of the verses of the Quran relating to permissibility of domestic violence is Surah 4:34. In deference to Surah 4:34, many nations with Shari'a law have refused to consider or prosecute cases of domestic abuse. Shari'a has been criticized for ignoring women's rights in domestic abuse cases. Musawah, CEDAW, KAFA and other organizations have proposed ways to modify Shari'a-inspired laws to improve women's rights in Islamic nations, including women's rights in domestic abuse cases.
On the other hand, scholars and commentators have stated that Muhammad directed men not to hit their wives' faces, he said in Farewell Sermon not to beat their wives in such a way as would leave marks on their body.
Shari'a is the basis for personal status laws in most Islamic majority nations. These personal status laws determine rights of women in matters of marriage, divorce and child custody. A 2011 UNICEF report concludes that Shari'a law provisions are discriminatory against women from a human rights perspective. In legal proceedings under Shari'a law, a woman's testimony is worth half of a man's before a court.
Except for Iran, Lebanon and Bahrain, which allow child marriages, the civil code in Islamic majority countries do not allow child marriage of girls. However, with Shari'a personal status laws, Shari'a courts in all these nations have the power to override the civil code. The religious courts permit girls less than 18 years old to marry. As of 2011, child marriages are common in a few Middle Eastern countries, accounting for 1 in 6 of all marriages in Egypt and 1 in 3 marriages in Yemen. However, the average age at marriage in most Middle Eastern countries is steadily rising and is generally in the low to mid 20s for women. Rape is considered a crime in all countries, but Shari'a courts in Bahrain, Iraq, Jordan, Libya, Morocco, Syria and Tunisia in some cases allow a rapist to escape punishment by marrying his victim, while in other cases the victim who complains is often prosecuted with the crime of Zina (adultery).
Sharia grants women the right to inherit property from other family members, and these rights are detailed in the Quran. A woman's inheritance is unequal and less than a man's, and dependent on many factors.[Quran 4:12] For instance, a daughter's inheritance is usually half that of her brother's.[Quran 4:11]
The status of women in classical Islamic law compared favorably to their status under laws of other contemporaneous cultures such those of pre-modern Europe, both in terms of financial independence and access to divorce, but the situation is different if it is evaluated against modern conceptions. Furthermore, slave women were not granted the same legal rights. Sharia recognizes the basic inequality between master and women slave, between free women and slave women, between believers and non-believers, as well as their unequal rights. Sharia authorized the institution of slavery, using the words abd (slave) and the phrase ma malakat aymanukum ("that which your right hand owns") to refer to women slaves, seized as captives of war. Under classical Islamic law, Muslim men could have sexual relations with female captives and slaves without her consent.
Slave women under sharia did not have a right to own property, right to free movement or right to consent. Sharia, in Islam's history, provided religious foundation for enslaving non-Muslim women (and men), as well as encouraged slave's manumission. However, manumission required that the non-Muslim slave first convert to Islam. Non-Muslim slave women who bore children to their Muslim masters became legally free upon her master's death, and her children were presumed to be Muslims as their father, in Africa, and elsewhere.
Starting with the 20th century, Western legal systems evolved to expand women's rights, but women's rights under Islamic law have remained tied to Quran, hadiths and their faithful interpretation as sharia by Islamic jurists.
On 14 January 2009, the Catholic Portuguese cardinal José Policarpo directed a warning to young women to "think twice" before marrying Muslim men: Christians should learn more about Islam and respect Muslims, but marrying a Muslim man is getting into a lot of trouble, that not even Allah knows where it would end, if the couple moved to an Islamic country. He also said that dialogue "with our Muslim brothers" is difficult, because it is possible to dialogue only with those who want to have dialogue. Human rights group Amnesty International criticized Policarpo for inciting "discrimination" and "intolerance", and a representative of the Muslim community in Portugal said they were hurt and surprised by his words, but remarked that his words could be interpreted as a call to respect differences and get to know the other religion. A spokesman for the Portuguese Episcopal Conference said the cardinal had offered "realistic advice" rather than "discrimination" or "contempt for another culture or religion".
The extent of negative attitudes towards Muslims varies across different parts of Europe.
The immigration of Muslims to Europe has increased in recent decades. Friction has developed between their new neighbours. Conservative Muslim social attitudes on modern issues have caused controversy in Europe and elsewhere. Scholars argue about how much these attitudes are a result of Islamic beliefs. Some critics consider Islam to be incompatible with secular Western society, and that, unlike other religions, Islam positively commands its adherents to impose its religious law on all peoples, believers and unbelievers alike, whenever possible and by any means necessary. Their criticism has been partly influenced by a stance against multiculturalism advocated by recent philosophers, closely linked to the heritage of New Philosophers. Statements by proponents like Pascal Bruckner describe multiculturalism as an invention of an "enlightened" elite who deny the benefits of democratic rights to non-Westerners by chaining them to their roots. They believe this allows Islam free rein to propagate what they state are abuses, such as the mistreatment of women and homosexuals, and in some countries slavery. They also state that multiculturalism allows a degree of religious freedom that exceeds what is needed for personal religious freedom and is conducive to the creation of organizations aimed at undermining European secular or Christian values.
Emigrants from nearly every predominantly Muslim country have immigrated to Canada. According to a 2001 poll, 54% of Canadians had an unfavourable view of Islam, which was higher than for any other religion.
In the United States, after the Boston Marathon bombing, the immigration processes in the country are assumed to be harder. Far-right commentator Bryan Fischer asked that no more visas be granted to Muslims, and no more mosques built; his opinion received support, most notably by the former presidential candidate Pat Buchanan.
In 2004, speaking to the Acton Institute on the problems of "secular democracy", Cardinal George Pell drew a parallel between Islam and communism: "Islam may provide in the 21st century, the attraction that communism provided in the 20th, both for those that are alienated and embittered on the one hand and for those who seek order or justice on the other." Pell also agrees in another speech that its capacity for far-reaching renovation is severely limited. An Australian Islamist spokesman, Keysar Trad, responded to the criticism: "Communism is a godless system, a system that in fact persecutes faith". Geert Wilders, a controversial Dutch member of parliament and leader of the Party for Freedom, has also compared Islam to fascism and communism.
Writers such as Stephen Suleyman Schwartz and Christopher Hitchens, find some elements of Islamism fascistic. Malise Ruthven, a Scottish writer and historian who writes on religion and Islamic affairs, opposes redefining Islamism as "Islamofascism", but also finds the resemblances between the two ideologies "compelling".
French philosopher Alexandre del Valle compared Islamism with fascism and communism in his Red-green-brown alliance theory.
John Esposito has written a number of introductory texts on Islam and the Islamic world. He has addressed issues including the rise of militant Islam, the veiling of women, and democracy. Esposito emphatically argues against what he calls the "pan-Islamic myth". He thinks that "too often coverage of Islam and the Muslim world assumes the existence of a monolithic Islam in which all Muslims are the same." To him, such a view is naive and unjustifiably obscures important divisions and differences in the Muslim world.
William Montgomery Watt in his book Muhammad: Prophet and Statesman addresses Muhammad's alleged moral failings. Watt argues on a basis of moral relativism that Muhammad should be judged by the standards of his own time and country rather than "by those of the most enlightened opinion in the West today."
Karen Armstrong, tracing what she believes to be the West's long history of hostility toward Islam, finds in Muhammad's teachings a theology of peace and tolerance. Armstrong holds that the "holy war" urged by the Quran alludes to each Muslim's duty to fight for a just, decent society.
Edward Said, in his essay Islam Through Western Eyes, writes that the general basis of Orientalist thought forms a study structure in which Islam is placed in an inferior position as an object of study. He argues the existence of a very considerable bias in Orientalist writings as a consequence of the scholars' cultural make-up. He states that Islam has been looked at with a particular hostility and fear due to many obvious religious, psychological and political reasons, all deriving from a sense "that so far as the West is concerned, Islam represents not only a formidable competitor but also a late-coming challenge to Christianity."
Cathy Young of Reason Magazine writes that "criticism of the religion is enmeshed with cultural and ethnic hostility" often painting the Muslim world as monolithic. While stating that the terms "Islamophobia" and "anti-Muslim bigotry" are often used in response to legitimate criticism of fundamentalist Islam and problems within Muslim culture, she argues that "the real thing does exist, and it frequently takes the cover of anti-jihadism."
In contrast to the widespread Western belief that women in Muslim societies are oppressed and denied opportunities to realize their full potential, most Muslims believe their faith to be liberating or fair to women, and some find it offensive that Westerners criticize it without fully understanding the historical and contemporary realities of Muslim women's lives. Conservative Muslims in particular (in common with some Christians and Jews) see women in the West as being economically exploited for their labor, sexually abused, and commodified through the media's fixation on the female body.
Bernard Lewis maintains that though slaves often suffered on the way before reaching their destination, they received good treatment and some degree of acceptance as members of their owners' households.
A Gallup poll found that 89% of Muslim-Americans viewed the killing of civilians as unjustifiable, compared to 71% of Catholics and Protestants, 75% of Jews, and 76% of atheists and non-religious groups. When Gallup asked if it is justifiable for the military to kill civilians, the percentage of people who said it is sometimes justifiable were 21% among Muslims, 58% among Protestants and Catholics, 52% among Jews, and 43% among atheists.
Ghosh claimed Muslim immigrants in India are now attacking Hindus and forcibly seeking to convert Hindu girls to Islam. He has demanded that the Indian government halt illegal immigration from Bangladesh and deport undocumented Muslims back to Bangladesh.
This tax was not imposed on the Christians, as some would have us think, as a penalty for their refusal to accept the Muslim faith, but was paid by them in common with the other dhimmīs or non-Muslim subjects of the state whose religion precluded them from serving in the army, in return for the protection secured for them by the arms of the Musalmans.(online)
Both Tabandeh and Mawdudi proceed to develop a synthesis between human rights and traditional shari‘a that conceals the conflicts and tensions between the two (p. 124).
Quote: The religious requirement that new slaves be pagans and need for continued imports to maintain slave population made Africa an important source of slaves for the Islamic world. (...) In Islamic tradition, slavery was perceived as a means of converting non-Muslims. One task of the master was religious instruction and theoretically Muslims could not be enslaved. Conversion (of a non-Muslim to Islam) did not automatically lead to emancipation, but assimilation into Muslim society was deemed a prerequisite for emancipation.
Quote: Islam imposed upon the Muslim master an obligation to convert non-Muslim slaves and become members of the greater Muslim society. Indeed, the daily observation of well defined Islamic religious rituals was the outward manifestation of conversion without which emancipation was impossible.
Quote: The slave who bore her master's child became known in Arabic as an "umm walad"; she could not be sold, and she was automatically freed upon her master's death. (p. 113)CS1 maint: extra text: authors list (link)