“The belief that a cosmic Jewish Zombie who was his own father can make you live forever if you symbolically eat his flesh and telepathically tell him you accept him as your master, so he can remove an evil force from your soul that is present in humanity because a rib woman was convinced by a talking snake to eat from a magical tree . . . yeah, makes perfect sense.”
Oh, wait! Here's a much better one! Once upon a time there was nothing. Then a tiny pinhead just appeared & exploded, creating all that there is today. A bunch of stuff floating around over countless eons finally managed to drop into the water on a really big rock, & turned into amoebas. Some of them turned into little fish. Some of them turned into little frogs. Some of them turned into little lizards. Some of them turned into really big lizards. But they were not really lizards. More like rhinos. But they were not really like rhinos. More like giant birds. Anyway, another big rock hit the really big rock, & made almost everything die. What didn't die turned into little mice. Some of them turned into bigger rats. Some of them turned into monkeys. Some of them turned into bigger apes. Some of them suddenly got really smart, & became men. Some of them starting killing a lot of people & stuff, & destroying big parts of the really big rock. They know that this is absolutely true, because they found a lot of funny little rocks & bones & stuff while digging in the dirt. Some of them found some funny papers in some funny clay pots, that told a different story. Some of them decided to believe the different story, & had wonderful things happen in their lives, & felt really good, so they didn't pay that much attention to the funny little rocks & bones & stuff any more. The ones that didn't have wonderful things happen in their lives, & didn't feel good, made fun of the other ones. But every once in a while, one of those does try the funny papers, has wonderful stuff happen, feels really good, & decides it's better to believe in funny papers than funny rocks.