Well moral absolutes exist in the Christian worldview and in reality. Atheism exists in irrationality. Okay they would say that moral absolutes do not exist because they have no grounding and no universal. But the Christian does know that moral absolutes exist because if not we have to reconsider our Christianity. The Ten Commandments would not be

The Ten Commandments would not be binding today, tomorrow, and forever if there were no such thing as moral absolutes. Because God is absolute, his moral standard is absolute, so don't ever let anybody tell you that moral absolutes do not exist. The atheist has to deny it because they have no God but themselves.