Have you actually read the thing? Leaving out not having read Darwin, not having taken on board what the Bible is actually like is a serious failing if you are going to claim that without it, anyone's morality is without standing.
I have read the Bible from cover to cover several times, and I believe that God inspired every single word in it. I am familiar with it, and I believe that whatever God says to be good, is good, and whatever He says to be evil is evil. Even if I don't like it, that's my sin and not his error. But that's a more theological argument which really can't be debated with someone who has no belief in a God anyway! For you, good is what you say it to be. Therefore you can't judge anybody, because they define good differently. Only I can say that I have absolute right and wrong, because the God of the universe has revealed it to us in His Word.