it would seem pointless after wars and concentration camps. but, that was to prove that this world is not 'of God.' it is controlled by Satan. why else was Jesus tempted by Satan - and asked by Satan if He wanted 'the kingdoms of the earth.' that is who is controlling them behind the scenes. money, power, intruege.
God is about humility, patience, longsufferring. the opposite things that lead to war. instead they lead to peace.
so, if we are willing to give up something for someone else, or be patient, or be humbled for a while - it's not like it's forever. i believe there will be a day of retribution. also, variously called 'dies irae.' or 'day of the Lord.' the wicked will be no more. gone. obliterated by their own armies fighting against each other. that is the way of Satan - to fight until nobody knows what is happening. chaos. God is about peace and order.
i think God is really quite smart. He just lets us do what we want for 6000 years and then,pushes the button and says 'enough.' now, you're going to do it My way. like it or not. but, i think people will like it.