I think it's more for people who think that regular organized religions lack a certain 'mass orgy' mentality in their congregations.

Anyone that hides rooms or staircases behind a bookshelf is cool in my book.

There are actually people with red makeup and horns during the rapid-fire cuts that the end. It's like people are trolling protestants.

Actually the pentagram with the lightning bolt was Anton laVey's personal sigil, and he had a pendant made up with that image that he wore constantly. Just find some photos of him to see what I mean. I'm not too sure about the odin knot, but LaVeyan Satanists grab any old symbol that they like for ritual purposes, so its likely just a personal thing for whoever's running the ritual.