Hym “You know what’s interesting about the Bible (and I’ve probably said this before but I’d like to expound upon it)? That the villain is always humanity. Anyone who doesn’t directly subordinate themselves to the protagonist or anyone who isn’t directly related to them is the enemy. All of them are slaughtered (and rightly so). Why? Because there is no solution that’s good for everyone. And if what you want to happen is something the horde is going to resist; there is no recourse other than killing their first born kids and burning their cities to the ground.”
The puppet master tells them they were all subserviant to the enemy, meanwhile he/she is the one pulling all their strings if any of them get out of line, like the enemy.
An ally of an enemy is your enemy (not a frienemy or any other coined word from a coined language). Its simple, you know not to trust anyone who's an ally of an enemy.
He/she isn't your friend when he/she is with you. He/she is pretending to be your friend when he/she is with you. An enemy that doesn't want you to know they're your enemy is still an enemy.