A Sunday school is a prison in which children do penance for the evil conscience of their parents.
Nothing can be more abhorrent to democracy than to imprison a person or keep him in prison because he is unpopular. This is really the test of civilization.
Whatever you think of de Sade, he was a complex figure and we should not look for easy answers with him. He was, strangely perhaps, against the death penalty, and he was never put in prison for murders or anything like that.