And some of the founding fathers even had slaves. So much for your Christian morality.
You do your argument no favor by pointing out that the Greeks had gods, either. Obviously, somebody's religion has to be BS. How fortunate that you belong to the "correct" one in this later stage of human history. Very lucky, indeed.
Are not the Greeks one of the important pillars of the thought and ethics of that enlightened God-free atheistic utopia you think you could live in if we could just stamp out Christianity in the public square? If they were right about some things, why not others?