A New Global Metric of Muslim Beliefs and Practices: “There is Only One Islam”


The results of this comprehensive Pew survey reflect what my colleagues and I have reported for well over a decade. For this we were smeared, defamed and libeled, forced to wear the scarlet letter of “islamophobia.” Will Pew be destroyed and rendered to the utter fringe of society? Will the SPLC and ADL hate-list them? Will media outlets and academia designate Pew racist and islamophobic?

A New Global Metric of Muslim Beliefs and Practices

Key insights from a revealing new report.

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Surveys conducted by Pew Research have revealed a great deal about Muslim beliefs and practices across the globe.  But they fall short of providing an overall picture of the Muslim world because they are divided by country or region.

The Muslim Global Demographic Project was established to answer this need by compiling Pew survey information in order to compute global percentages and global population statistics on Islamic beliefs and practices as they relate to security, terrorism, and the potential threat to Western culture.[1]

Taken together, nearly 1.1 billion Muslims are represented in the 39 countries where Pew surveys were completed between 2008 and 2012.[2]  This encompasses two-thirds of the world’s 1.6 billion Muslims (based on a 2010 estimate), though not every country was polled in all of the survey questions.[3]  Since the surveys cover only countries with substantial Muslim populations, the United States and Western Europe were not included.

Some of the key findings of the project are presented here.  For the complete report and analysis, see “Muslim Beliefs & Practices:  A Global Demographic Assessment.”

Most Muslims Believe there is Only One Islam

67% (736.3 million) of Muslims surveyed believe that there is only one true interpretation of Islam’s teachings.  Disagreements over the interpretation of Islam have sometimes resulted in deadly violence, mostly between Sunnis and Shias.  However, the acceptance of Shias by Sunni Muslims varies considerably between countries.  Though most Muslims are certain about the true interpretation of Islam, they are divided over how far to stretch the boundaries of Islam.

Devout Muslims—those who say their lives reflect the hadith and the sunna to a considerable degree—comprise 41% (369.7 million) of the survey population. [4]  Statistically, they are more likely to say that (1) sharia is the revealed word of Allah, (2) that Islam and sharia have only one interpretation, (3) that proselytizing is a religious duty, and (4) that sharia should be the official law of their country.[5]

Most Muslims Prefer to Live Under Sharia    

Though Muslims are evenly divided over the belief that there is only one interpretation of sharia, 64% (581 million) believe it is the revealed word of Allah, rather than a form of law developed by men and based on Allah’s word.  69% of Muslims (741.8 million) in the countries surveyed favor making sharia the official law of their country.  This was the highest number in the project’s survey questions.

About one-third (274.0 million) believe sharia should be applied to non-Muslims in some way, and about one-third to one-half of Muslims (352.2 million – 463.3 million) support extreme punishments such as whippings, amputations, stoning for adultery, and the death penalty for apostasy.

These punishments belong to a legal class of penalties known as Hudud.  They are prescribed by the Quran, the sunna (the example and teachings of Muhammad), and traditional sharia (see table below). Hudud offenses are considered crimes against Allah.


Hudud Punishment


Adultery Stoning Bukhari 6814, 6827, 6828; Ibn Ishaq 267, 652; Reliance o12.2
Fornication (or Sodomy) 100 Lashes Quran 24:2; Bukhari 6827, 6828, 6833; Reliance o12.2
False Accusation of Adultery 80 lashes Quran 24:4; Reliance o13.3
Drinking Alcohol Up to 80 lashes Muslim 4452; Bukhari 6780; Reliance o16.3
Theft or Highway Robbery Amputation of Hand and/or Foot Quran 5:33, 38; Bukhari 6787, 6789; Ibn Ishaq 678; Reliance o14.1, o15.0
Highway Robbery

with Homicide

Crucifixion or Death by Sword Quran 5:33 (see Bukhari 6802-6805); Ibn Ishaq 678; Reliance o15.2
Apostasy Death Bukhari 3017, 6922; Ibn Ishaq 550; Reliance o8.1
KEY:     Bukhari—A Sunni, canonical, hadith collection (Darussalem version numbering)

Ibn Ishaq—Life of Muhammad, trans. by A. Guillaume (Oxford U. Press, 1955)

RelianceReliance of the Traveler: A Classic Manual of Islamic Sacred Law, trans. by Nuh Ha             Mim Keller (Amana Publications, 1991)

A Large Minority of Muslims Support Forced Veiling & Honor Killing

About one-third of Muslims surveyed support the forced veiling of women (349.4 million) and say that honor killings are justified (361.8 million), in at least some circumstances, for women who commit pre or extra-marital sex.  Muslims are less likely to justify honor killings for men who commit the same offences.

Honor killing is not taught in the Quran and it is condemned by many Muslim clerics.  Nevertheless, a provision of traditional sharia law called Qisas, which is found in some countries, provides a legal loophole for honor killing by allowing blood relatives to forgive the perpetrator.[6]

Many Muslims Reject Basic Universal Rights and Freedoms

When taken together, about one-third to one-half of Muslims (274.0 million – 463.3 million) in the survey countries uphold beliefs and practices (in addition to support for sharia) that are contrary to many Western values and internationally recognized human rights, as shown in this table.

Survey Question

Number Who Affirm

Conflict with Western

Principles & Values

Favor sharia in their country


741.8 million

Separation of religion and state

Religious freedom

Apply sharia to non-Muslims

in their country


274.0 million

Separation of religion and state

Religious freedom

Individual freedom

Freedom of speech

Equality of all persons under the law

Whippings and amputations for

crimes like theft and robbery


456.7 million

Cruel and unusual punishment
Stoning for adultery


463.3 million

Cruel and unusual punishment
Death penalty for apostasy


352.2 million

Religious freedom

Freedom of speech

Cruel and unusual punishment

Forced veiling of women


349.4 million

Individual rights

Gender equality

Justify honor killings for women who commit pre or extra-marital sex


361.8 million

Religious freedom

Individual rights

Gender equality

Conspiracy to murder

Over 100 Million Muslims Can Justify Using Violence in Defense of Islam   

Nearly 17% (which includes 114.7 million adults) of the survey population said that violence against civilians, is justified in order to “defend Islam from its enemies.”  Though the percentage is small, the population number is significant and implies a substantial base of moral and, perhaps, material support for violence and terrorism.[7]  If we assume that 17% is representative of the global Muslim population as a whole (i.e., 1.75 billion in 2015), then the number rises to approximately 191.5 million adults.  Granting that only a small percentage of those who justify terrorism would actually commit a terrorist act, these numbers are still more than sufficient to sustain a significant global terrorist threat for the foreseeable future.

The defense of Islam can be broader than resistance to armed attacks.  For many Muslims, insulting Islam or Muhammad is regarded as an attack on Islam.  Historical support for this view comes from Islam’s traditional texts.  Those who criticized or mocked Muhammad, including women, the elderly, and possibly children, were assassinated at his behest or with his approval according to both the hadith (Bukhari 1067, 4037, Abu Dawud 4361) and Muhammad’s biography, the sira (Ibn Ishaq, 551, 665, 675).  Numerous terrorist threats and attacks on Western targets have been provoked by nothing more than words or pictures which some Muslims found offensive.

There are other important conclusions regarding the survey population which have major implications for immigration.  These are discussed in the full, project report:

  • Devout Muslims are more likely to reject the legitimacy of Western laws and government.
  • Converting non-Muslims and promoting sharia are religious imperatives for many Muslims.
  • Intolerance of non-Muslims is widespread and continues to be taught.
  • A significant minority of Muslims are conflicted about modern society
  • A pre-scientific worldview continues to inhibit Islamic historical and scientific inquiry.

The report analyzes 16 survey questions in detail, providing the historical, theological, political, and social background of Muslim beliefs and practices.  It also includes an assessment of security, terrorism, and areas of potential conflict with Western culture—information which is crucial for policymakers and analysts.

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