From a Salon interview with reporter Lawrence Wright, whose book Going Clear: Scientology and the Prison of Belief has been made into a soon-to-be-released HBO documentary:
SALON: Miscavige strikes me as a little bit more like Stalin than like the pope. The pope has to manage an enormous political bureaucracy, and multiple competing seats of power. Miscavige simply got rid of everybody who stood up to him.
WRIGHT: Or he kept them on and intimidated them so much. I’ve spoken to 12 people who said they had been physically beaten by David Miscavige, and many other people who witnessed it. He rules by terror, and those who question him are beaten into submission and/or locked up in one of these reeducation camps.