The last time I ever witnessed a movement that had these qualifications: (1) a totally monolithic movement with a single point of view and a single authoritarian head; (2) replete with fanatical followers who are prepared and programmed to do anything their master says; (3) supplied by absolutely unlimited funds; (4) with a hatred of everyone on the outside; (5) with suspicion of parents, against their parents — the last movement that had those qualifications was the Nazi youth movement, and I'll tell you, I'm scared.
Rabbi Maurice Davis, quoted in Ronald Enroth, Ph.D.'s Youth, brainwashing, and the extremist cults, 1977, Grand Rapids: Zondervan Pub. House.
Understanding Scientology / Conclusion: Coming Out of Scientology: The Nightmare Ends, The Nightmare Begins[cs.cmu.edu]