In the history of Islam, in the classical era, radicalism has existed, so it is not a new phenomenon in the modern age. Since the time of the Caliph Umar radicalism has emerged, but not yet organized, only in the time of the Caliph Ali bin Abu Talib this movement began to be systemized and organized through a Khawarij theological movement with its radical and uncompromising understanding of various acts of violence to oppose the tahkim or arbitration between the caliphs. Ali ibn Abi Talib and Muawiyah. Arbitration takes place in the context of the Shiffin war in which the khawarij group considers those who agreed to deviate from Islamic teachings. Later in Cairo an organization that had the same characteristics as the khawarij emerged, who ...