One last thing; If God is real, then the choice is whether or not to do things His way. If God does not exist whether or not you believe does not matter.
What if the god that exists is not the Christian God? What if he is a god of rationality and logic that will reward those who base their belief on reason and he hates faith? Then it would very much matter if you believe.
Or, what if God is a sadistic jealous mischievous bastard? Maybe he wanted the jewish people to go around committing genocide and conquering other races for no reason. He is extremely powerful so it was impossible for the Jewish people to know he was not. Maybe the God that exists will reward evil and punish good. We have no way of knowing what some unevidenced being would or wouldn't do. You could end up suffering for eternity because you believe in a righteous God. Think of it this way. Which God is going to punish your more harshly, a just one or an unjust vindictive God? You would be much better off worshiping an evil god because he would punish you far more harshly than a righteous one under this line of reasoning.