So, you want to codify Biblical law. I have a question for you. Can you prove there's such a thing as God? That was rhetorical. Of course you can't. So, you want to codify the laws of a god you can't even prove actually exists. Does this make sense?
I have another question for you. Why wouldn't a god who damns people to Hell for not believing in him prove his existence? If there was such a thing as God, it would be easy for him to erase all doubts of his existence. So, why doesn't he?