This chapter begins with a discussion over the Diagnostic and Statistical Manuals’ uses of the terms “brainwashing,” “cult,” and “terrorism” in relation to high-demand religions and how the terms continue to have salience despite concerted efforts by critics to disqualify them as useful scientific constructions. The coercive techniques that authoritarian and totalitarian subgroups use to indoctrinate, coerce, and abuse members justify these terms’ use, as does the fact that these subgroups sometimes use intense and violent techniques to instill conformism and silence among members and critics. Likewise, religious defenders who object to psychiatric use of the “hallucination” term to describe religious visions fail to acknowledge the irrational and magical content of supernatural beliefs and the (often false) hope that they can inspire. The exalted, then depressed, visions of the Sabbatians’ Sabbatai Şevi exemplify religiously infused bipolar delusions, and Marshall Applewhite’s schizophrenic delusions and hallucinations led to the deaths of dozens of his Heaven’s Gate followers. Peoples Temple founder, Jim Jones, also held delusional beliefs, whose contents and deadly consequences were amplified by multi-substance abuse.