According to TDK, fatwa; "It is a document given by the mufti that explains the solution of a problem related to Islamic law according to religious rules." Fatwa according to Merriam-Webster dictionary; "It is a legal opinion, opinion or decree put forward by an Islamic religious leader." The fatwas announced by the religious leaders of the Islamist-armed terrorist organizations are published with the aim of achieving a purpose. For example, a fatwa was published by Osama bin Laden, the founder of the Islamic terrorist organization Al-Qaeda, on 23 February 1998, and the aim was set that killing Americans and their allies should be the mission of every Muslim. The terrorist attack on the USA on 11 September 2001 is also considered as a result of this fatwa. As a matter of fact, Islamic organizations such as the Eritrean Islamic Correction Movement (EIJM), the Islamic Community (IG), and the Uzbekistan Islamic Movement (IMU) also carry out a jihad activity by signing or issuing fatwas. Sources: TDK; Merriam-Webster; Start National Consortium for the Study of Terrorism and Responses to Terrorism

Fundamentalism has its origins in the Latin word "fundus". Fundus means property in Latin. According to TDK, fundamentalism; is defined as fundamentalism . In the Oxford English dictionary, fundamentalism is used in two senses. In the first, it was explained that the original version of the Bible should be taken as the basis, limited to Christianity; In the second, the concept is defined in a more general way as being strictly adhering to the teachings required in any religion. The concept of fundamentalism, which has been identified with radical Islam and terrorism and evaluated in a theological perspective, has become loaded with sociological and political meanings different from these meanings after the 1990s. It has started to be used as a blind belief in any religion, ideology, doctrine, thought and imposing it on those around him. The concept of fundamentalism, when viewed from a historical perspective, was first used for Christians. It is known that this word was put forward in order to emphasize that the Christian holy book is important to take the miracles of Jesus as the basis and to proceed in this direction. Sources: Latin English Dictionary; TDK; Oxford Advanced Learner’s Dictionary; Martin E. Marty “Fundamentalism as a Social Phenomenon”; David Harrington Watt “Muslims, Fundamentalists, and the Fear of the Dangerous Other”.