Seriously, I'm not making this shit up.
Mormons believe that Satan is Jesus' disgruntled younger brother who was jealous of all the attention God gave Jesus.
Sibling rivalry goes way back then. Cain and Able wern't the first to have issues i guess.
HL Mencken famously said that no rational man could make a statement of his religious beliefs as a cold catalog of facts.
As a Christian, one is obliged to believe that Gd knocked up a peasant girl, compelled her boyfriend to marry her, but leave her alone till after Gd's kid was born. That Gd then allowed his son to be used as a blood sacrifice to take away the sins of man kind. That after having been killed, three days later the kid then came back to life and wandered around town for 40 days before being carried off to heaven.
In addition, Catholics believe that the host is the flesh of god, and the wine is the blood of god, and both of these should be consumed as a memorial to the sacrifice.
And this doesn't begin to deal with the whole Genesis "You old man is a monkey" issue.