The article examines the influence of specific radical movements of Islam on their adherents through the linguistic attitudes. In the introduction, the author examines the general global reasons due to which a person in modern society is especially susceptible to various types of involvement in destructive cults. The main part of the article is devoted to the consideration of practical examples of verbal manipulations used by the Islamists. The paper also mentions extremist and terrorist organizations whose activities are prohibited on the territory of the Russian Federation and discusses their distorted interpretations of classical theological texts. By analyzing specialized literature in Russian and Arabic, as well as empirically, the research reveals the ways to influence the personality of a believer through the language. The author of the publication personally held many meetings in pre-trial detention centers with those under investigation and accused on extremist and terrorist charges and collected a large amount of empirical material. A conclusion is drawn about the main linguistic manipulations of Islamist organizations.