It was a long road as the more I researched about the Bible the more I realized it was just the words of men. But the final knock down arguement came from Sam Harris (The Moral Landscape). He referenced the genocide the Israilites committed against the all the different nations because God told them to. Specifically, when Moses told them to kill all the Midianites - men, women, and children - and only preserve the virgins so they could be parceled out to the Israilite men along with the Midaintites cattle later on.
Sam Harris asked, if you were an Israilite man in the Bible and you're told to kill a woman and her child what is the most humane way to do it? Do you run the family through with your sword? Or do you decapitate them? Perhaps you just bash their heads in with a rock? Do you kill the mother first - and make the child watch? Or is it more humane to make the mother watch you kill her son before you kill her? Exactly what method would a loving God want you to use to slaughter unarmed women and children?
It was then that I realized that the charachter of Jehovah in the Bible was completely immorale. And that the Bible was written by men not by the creator of our universe. About a week later, I realized that, if the Bible wasn't true, I didn't really have any good reason to believe a God exists. I remain open to the possibility, but the time to believe something is after it has been demonstrated to be true. Not before. There's no point in drawing conclusions in the absence of evidence.