The dramatic inconsistency of the listed lineage of Jesus Christ, from David down to Joseph. Seeing that JC is the most important character in the bible (besides god) and that it is supposedly fulfilling prophecy you'd think it would be an important list to get right. For a god, at least.
Matthew (1:1) lists 28 intermediate generations from David to Joseph. But Luke (chapter 13) lists 41 generations. But wait...even further, nearly none of the names match each other's list. Huge discrepancy there.
Even more confusing, if Jesus supposedly was born from a virgin mother, how does Joseph lineage have anything to do with Jesus? He wasn't his father.
How could a god screw up so royally? Not likely. But it is likely if a god had nothing to do with the bible.