Indeed the Temple do not sincerely express belief

There's that lie, right on cue.

Sarcasm is only sarcasm when it is the opposite of what you normally do or belive. The teachings, lore, stories, and dogmas of your religion can not be sarcastic. When you do it all the time, say it all the time, preach it, and live it then it is not sarcasm.

That entire subversion of reality you just spouted is designed to get soft brain fools to literally worship satan, something they would normally not do, with the simple cognitive dissonance of pretending they aren't really worshiping satan. But you still use the imagery. You still speak the words. You literally do everything exactly how a believer would, and then comfort yourslef in the delusion that its just a prank bro.