It does not submit to God's law, nor can it do so. Those controlled by the sinful nature cannot please God. When hostilities have reached a climax and neither side is willing to talk, war is inevitable. There is God's side of the story and our side. Like in every conflict, there are at least two sides.
War brings great loss.
So, somebody has to take action to resolve the conflict., and someone could certainly die trying to resolve it. Well, Jesus did. Talk is cheap, but Jesus' blood was priceless and eternally valuable to God. That's what it took to obtain peace and reconciliation. Jesus went to war on the cross.