My wife was watching a movie on Lifetime called "In God's Country" about a religious cult. It gave me the perfect opportunity to tell her the identifying marks of a cult.
I said, "Cults claim they have a direct pipeline to God, that everyone outside of their group is under the influence of Satan, and they keep people in line by practicing shunning." You should have seen the look on her face. She got it!
I left it at that not wanting her programming to kick in and make her turn against me.