This is a cheap consolation. No matter what happens, war is disgusting. It is brutal and cold. And in the end, there is no reason for war, just as there is no reason for evil. But there is a reason to kill and defeat evil.
Evil is the cause of war.
Needless death is what gives rise to war. And wars are fought to blot out the evil. The expectation of war, is that justice will be served. But war is not justice. Innocent people die in war.