Consider what Dr. William Lane Craig wrote: “If life ends at the grave, then it makes no difference whether one has lived as a Stalin or as a saint.…” “Who is to judge that the values of Adolf Hitler are inferior to those of a saint? “The world was horrified when it learned that at camps like Dachau the Nazis had used prisoners for medical experiments on living humans. But why not? If God does not exist, there can be no objection to using people as human guinea pigs.” [Apologetics: An Introduction, pp. 37-51].
The Christian claims to have absolute and objective ethical standards for knowing right from wrong, which is something they claim atheists don’t have. The Christian standards are grounded in the commands of a good creator God, and these commands come from God’s very nature and revealed to them in the Bible. There is a philosophical foundation for this claim, and then there is the case Christians present that the Bible reveals God’s ethical commands. Both are illusions of superiority. It is an illusion that the Christian moral theory is superior, and it is an illusion that Christians know any better than others how they should morally behave in our world.