Made No Sense.

So Satanists abduct a group of girls to be used as sacrifices to Satan but unbeknownst to them one of them was a witch who “Has her own plans for the devil worshippers”. Ok, but she was also evil & Satanic as well, so how does that work? It would make sense if she was a non black good witch or if you prefer “white witch” but she wasn't so what was the point & why would she care to oppose them since their aims are aligned?

Yes I know supposedly she was “possessed” by Satan but the argument still applies, why would Satan go against his own, the Satanists dedicated to him & say “Ok, I’m using her who’s mine to go & kill those over there who are mine?” As Jesus had observed “How can Satan drive out Satan? If a kingdom is divided against itself, it cannot stand.”

Seems the people who made this were awfully confused by the semantics. At least I think so.