I think the folks who joined Jim Jones's church did so because they truly believed in his stated ideals of racial equality and social justice. That's why he was able to convince one thousand of them to immigrate to the jungle of Guyana. Although history has stigmatized Jonestown residents as the people who "drank the Kool-aid," I'd argue that they were noble idealists. Furthermore, they were murdered. They didn't willingly drink poison - they were forced to do so at gunpoint. They sought the ideal, only to have their leader horribly betray them.