Fear Tactics
"You should be ready for death at any moment...,
this is a fact. You can die at any moment. Whether it is from an atom bomb or a truck running through your house" - Chris Butler

Fear tactics and armageddon predictions are the staple diet of cults and cult leaders. Instilling, and constantly reinforcing, a believe of an imminent, catastropic danger, is a method of scaring people into not leaving the cult.