Ok here are the two most ridiculous uses of Religion I've seen and they are both from comic books (I'll... save the "Catholic Anti-Christ" Plotline for someone else)
First we have Black Panther... I shall Title this: The Popemobile is a PegasusNow in this series they are basically pitting Black Panther against the iconic enemies of African Countries. So we have profiteers, savage African countries, and even America itself. There are no slavers but that is more due to that being completely out of date...
So then we get to, obviously, Catholic Missionaries... And HOW are they represented? Well apperantly the Vatican has a top secret scientific bunker where it trains Knights equipped with robot flying horses in order to do the Vatican's more... evil deeds.
Why the world is the Vatican more relevant and well equipped then the real life Vatican by leagues?
Then we have the New 52 reboot of Raven, which I shall title: Satanists are secretly awesomeSo in the DC universe Satanists are... well... evil (Then again, given the context... that makes sense. Same way that Catholics are probably evil in SMT
) HOWEVER not only are they an order going back centuries but they apparently have the manpower and resources to build a huge structure in the freeken desert.
This is soooo weird because Satanists are no big deal in real life and are more similar to Wiccans in that you could separate them into "Whinny Teens wanting to be edgy" and "The actual ones"... This upgrade is immense!
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Goodness Comic books. Being part of a Religion is so much more awesome in your universe then it is in real life...