I see Scientology and Mormonism as virtually the same thing. Both make slaves of their followers, have an odd relationship with an alien conspiracy theory, and are based on the drug-induced visions of a complete scam artist. I can't think of anything more whacky. I'm sure there are some out there given the crazy behavior of many religious people.
I find Buhdism kind of crazy. Not particularly the religion ( it was never meant to be a religion at all) but the behavior and practices of its followers. Monks that set themselves on fire to protest things...NUTS! How the fuck is that becoming one with nature?
I understand some of the crazy things demanded of older religions.
Jews and Muslims don't eat pork- because it use to be dangerous.
Hindus don't eat meat (cows)- because a cow could plow a field and feed more people that way.
Banning alcohol- well many people abuse and become out of control under certain influences.
Of course, times are different. Pork is a safe meat to eat other than the cholesterol thing. Food is relatively available to Hindus if they could just afford it. There is no need to ban meat.
Of course, Hindus have many sects and one actually demands the wife of a man being cremated throw herself on the funeral pyre and be consumed by the flames...fucking stupid and barbaric!
Of course, christianity is really far out there. The idea that a person was born of a virgin was executed for no reason and then came back as a ghost is like a bad movie.
Fucking all religions are whacky, but what do you consider the whackiest?