there are a ton of contradictions throughout the bible. (check out
skeptic's annotated bible).
hell, the first commandment is itself contradictory and, in fact, impossible to obey.
"I am the lord your god, worship no other gods but me."
first off, he is commanding us to worship him, and therefore we must follow his command and worship him. however, if we are to truly believe in god and worship him, we must be doing it out of our own free will - we must be choosing to worship him because we want to, not because he told us to. therefore, logically speaking, no one can even obey the first commandment properly since you cannot worship god because he told you to and at the exact same time worship god by your own choosing.