I also wondered if they were Satanists. There was a devil worship cult a few years ago which burned large numbers of churches in several states. The head of it and his stripper girlfriend were caught and received long sentences (unless a governor pardoned them). However, they also had followers, mainly young teens at that time, who signed pledges in blood to continue doing evil.
That's sick! I think I heard of it too. I believe it was in the 1990s or something like that. Those Satanists corrupt youth's mind.