William Lane Craig said this quote

‎If there is no God, then man and the universe are doomed. Like prisoners condemned to death, we await our unavoidable execution. There is no God, and there is no immortality. And what is the consequence of this? It means that life itself is absurd. It means that the life we have is without ultimate significance, value, or purpose.

~ William Lane Craig

So whom does God wrong in commanding the destruction of the Canaanites? Not the Canaanite adults, for they were corrupt and deserving of judgment. Not the children, for they inherit eternal life. So who is wronged? Ironically, I think the most difficult part of this whole debate is the apparent wrong done to the Israeli soldiers themselves. Can you imagine what it would be like to have to break into some house and kill a terrified woman and her children? The brutalising effect on these Israeli soldiers is disturbing.

~ William Lane Craig

To say that the holocaust was objectively wrong, is to say that the holocaust was wrong even though the Nazis who carried it out thought that it was right, and it would still have been wrong, even if the Nazis had won World War II and succeeded in brainwashing or exterminating everybody who disagreed with them, so that everyone in the world thought that the holocaust was right and good. To say that the holocaust was objectively wrong, means that it's wrong regardless of the outcome of World War II. The premise is that if there is no God, then moral values or duties are not objective in that sense.

~ William Lane Craig

The most popular form of atheism is a philosophy called naturalism. Naturalism is the view that science and science alone determines what exists. What exists is what our best scientific theories of the world require. If something is not required by our best scientific theories of the world, then it does not exist. But this is devastating for ethics because moral values are not required by science. Science is morally neutral. You cannot find moral values in a test tube. So it follows immediately, from the perspective of naturalism, that moral values do not really exist. They are just subjective illusions of human beings.

~ William Lane Craig