G-d might be meant to illustrate that voice of the people-the vox populi. In this case, G-d had demanded that Saul (or the “prime minister”)  enter into battle with the Amalekites (Hamas and its savage partners) and destroy them utterly even if that means to the last child, cow and goat. As cruel as this appears, it is a lesson that teaches a nation in terrible danger that it has a legitimate obligation to put a definite end to a substantial threat. The end of such a conflict must make it impossible for that enemy to rebuild and continue to vex one’s nation forever.