The purpose of the article is to identify those factor in the system of religious terrorism that play a key role in introducing an individual to religious terrorist activities in the 21st century, to classify them according to social and group characteristics. The research methodology is a retrospective analysis of the essence and content of religious terrorism, as well as the socio-psychological characteristics of militants of religious terrorist organizations. A holistic system-integrated approach allows identifying the key factors that are leading in the process of radicalization of an individual. The main results of the study are identified key risk factors that contribute to the radicalization of the individual, their classification as well as the creation of a manageable system that contributes to becoming a member in a religious terrorist organization. The obtained results will provide significant assistance in organizing anti-terrorist activities. They will also help to build a system of counteracting the existential threats of an individual, adequate to religious terrorism.