This paper attempts to explain the effect of media on public opinion in the light of "brainwashing" theory. After reviewing the history of the term "brainwashing", the researcher provides detailed illustration of its modern applications especially the techniques used in "destructive cults" to convince their members commit suicidal attacks. Then, the research focuses on the "Nation of Islam" as a famous example of destructive cults to show how the media coverage of this perverted movement had dangerous effects on the public opinion in America that helped create an illusive kind of discourse that researcher refers to as "anti-Islamic Brainwashing discourse" .