Whenever an atheist makes any moral statement, a Christian will inevitably offer up some version of the argument from morality. Sometimes the argument will be that you can’t make any moral statement at all without believing in God. Sometimes the argument is that we only think those things are immoral because God has planted in us a moral conscience that intuitively knows what is right and wrong. Either version fails if you’ve read the Bible at all.
Here’s the next question I like to ask people making either argument: Give me a list of things that are morally wrong, things that we simply know intuitively are wrong because God has given us a moral conscience that says is wrong or because God explicitly commands that those things are morally wrong in the Bible. A few obvious answers: rape, genocide, slavery. Nearly everyone will intuitively agree that these are moral wrongs, whether they are Christians or atheists. But that leads to one rather obvious problem:
The Bible makes much more sense as the record of a culture that worships a god that doesn’t exist. That explains the inconsistencies and incoherencies and contradictions far better than all the post hoc rationalizations of Christians.