Some will say the war is wrong because of death. Then they have to say death is wrong wherever it is preventable not just in war. That being said walking and not driving cars would have saved 43K American lives last year alone. Really more when you consider the health benefits of walking. So we create a gray area that allows a certain number of acceptable deaths for our personal freedom.
So we then have an artifical reality that says preventable death is always wrong unless it interferes with our personal freedom. That is the basis for the difference of opinion re the war in Iraq.