The atheist believes the (Schlitz) beer commercial, which tells us to “Go for the gusto since we only go around once!” Now, I submit that’s a patentl… - William Lane Craig

We've already said that it's the Holy Spirit who gives us the ultimate assurance of Christianity's truth. Therefore, the only role left for argument and evidence to play is a subsidiary role. I think Martin Luther correctly distinguished between what he called the magisterial and ministerial uses of reason. The magisterial use of reason occurs when reason stands over and above the gospel like a magistrate and judges it on the basis of argument and evidence. The ministerial use of reason occurs when reason submits to and serves the gospel... Should a conflict arise between the witness of the Holy Spirit to the fundamental truth of the Christian faith and beliefs based on argument and evidence, then it is the former which must take precedence over the latter, not vice versa.

Very often atheists themselves admit that they have no evidence of God's absence, but they try to put a different spin on it. They'll tell you, “No one can prove a universal negative” (like “There is no God”). They think this somehow excuses them from needing evidence against God's existence. But not only is it false that you can't prove a universal negative (all you have to do is show something is self-contradictory), but more importantly, this claim is really an admission that it's impossible to prove atheism! Atheism involves a universal negative, you can't prove a universal negative, therefore, atheism is unprovable. It turns out that it is the atheist who is believing a view for which there is and can be no evidence.

Moreover, if we believe, as I do, that God's grace is extended to those who die in infancy or as small children, the death of these children was actually their salvation. We are so wedded to an earthly, naturalistic perspective that we forget that those who die are happy to quit this earth for heaven's incomparable joy. Therefore, God does these children no wrong in taking their lives.
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.