I want to be clear: the 1st amendment gives you the right to have whatever religion you want. And I fully support that. You can have any religion or any version of any religion you want.
But you don't have to cherry pick from the old testament to refute any historical accuracy of the Bible or it's "truth." There's all kinds of stuff in the New Testament too.
If you like, I can run through some. There's a lot, so it'll just be a high level view.
But again, you are free to believe any religion you care to, or any version of that religion. Just like how everyone else is free to follow there religions. Or none at all.