Traditionally, fundamentalism can be defined as a defense against tradition. In this field fundamentalist groups strongly believe in the accuracy of their interpretations of religious teachings. Two factors worth notifying as reasons for formation of fundamentalist: internally, the changes in the Arab world such as imperfect democracies and also radical and shallow ideation of thinkers such as Sayyid Qutb could be noticed. Thinkers like him had always followed the fundamentals and Rejected any discretion and rationalism. And externally, the most important factor to be mentioned is Israel’s and western politics Led by America. The clear example of it is the invasion of Iraq and also a little earlier the invasion of Afghanistan by Soviet Union. In the examples mentioned western countries by supporting the Jihadists and extremists tried to reach their goals in the region. Due to this the authors using descriptive-analytic method are trying to answer the question what factors underlie the creation and growth of extremists in the Islamic world and also what is the best way to stop these deviant groups? The results of processing hypothesis shows the role of the superset groups such as America and the superficiality of the Islamists view are of the most important reasons of creation and growth of these groups. And also military confrontation would led to a chaos; in fact the best policy is the unity of Islamic World and rethinking the ideas of radical Arab thinkers.