Islamic extremism

Islamic extremism is characterised by extremist beliefs, behaviors and ideologies adhered to by some Muslims within Islam. The term 'Islamic extremism' is contentious, encompassing a spectrum of definitions, ranging from academic interpretations of Islamic supremacy to the notion that all ideologies other than Islam have failed and are inferior.

Islamic extremism is different from Islamic fundamentalism or Islamism. Islamic fundamentalism refers to a movement among Muslims advocating a return to the fundamental principles of an Islamic state in Muslim-majority countries. Meanwhile, Islamism constitutes a form of political Islam. However, both Islamic fundamentalism and Islamism can also be classified as subsets of Islamic extremism. Acts of violence committed by Islamic terrorists and jihadists are often associated with these extremist beliefs.

The academic definition of radical Islam consists of two parts:

UK High Courts have ruled in two cases on Islamic extremism, and provided definition.

Aside from those, two major definitions have been offered for Islamic extremism, sometimes using overlapping but also distinct aspects of extreme interpretations and pursuits of Islamic ideology:

In 2019, the United States Institute of Peace issued a report on extremism in fragile states, advocating the establishment of a shared understanding, operational framework for prevention, and international cooperation.

According to the academic definition of radical Islam, the second condition for something to be called radical Islam, is that it is antigovernmental. Consequently, a government is a condition for radical Islam. However, even though the peace of Westphalia was established in 1648 and thus introduced the nation state, the writings of the formative centuries of Islamic history are influential to the contemporary writings that were coined radical after the concept of the nation state was established in the Muslim world as well. Key influences of radical Islam that stem from early Islam include:

Islamic extremism dates back to the early history of Islam with the emergence of the Kharijites in the 7th century CE. The original schism between Kharijites, Sunnīs, and Shīʿas among Muslims was disputed over the political and religious succession to the guidance of the Muslim community (Ummah) after the death of the Islamic prophet Muhammad. From their essentially political position, the Kharijites developed extreme doctrines that set them apart from both mainstream Sunnī and Shīʿa Muslims. Shīʿas believe ʿAlī ibn Abī Ṭālib is the true successor to Muhammad, while Sunnīs consider Abu Bakr to hold that position. The Kharijites broke away from both the Shīʿas and the Sunnīs during the First Fitna (the first Islamic Civil War); they were particularly noted for adopting a radical approach to takfīr (excommunication), whereby they declared both Sunnī and Shīʿa Muslims to be either infidels (kuffār) or false Muslims (munāfiḳūn), and therefore deemed them worthy of death for their perceived apostasy (ridda).