Stand to Reason blogger Brett Kunkle makes a good point about atheism and moral values. Namely, atheists can have good moral values. But knowing moral values, and offering a basis for presupposing moral values, are two different things.
For example, Christopher Hitchens loves to offer a challenge to theists. I heard him challenge Mark Roberts in a radio debate hosted by Hugh Hewitt, sometimes called The Great God Debate.
You have to name a moral action taken or a moral statement uttered by a person of faith that could not be taken or uttered by a non-believer. I have yet to find anyone who can answer me that.
~ Christopher Hitchens
While I have seen this challenge adequately answered, the challenge itself misses a basic point. This challenge proves something the Christian theist already agrees with (Romans 2:14,15). Atheists know what good means and atheists can do good things. They can't not know what good is. The knowledge of right and wrong is written on the heart.