I've given it a lot of thought, and I think the best religion is Islam. You see, if you take the first few letters of Islam, you get 'isla,' the same letters that start Island. And everyone loves islands. Except maybe the Skipper. They're just so nice and sunny and tropical.
But if you take the first few letters of Catholicism, for example, what do you get? 'Cath.' Like catheter. And that's just plain gross.