Am I wrong to think this?

I believe that war is immoral. Yes, I understand that sometimes war is justified- Nazis/Islamic terrorists are clearly evil. But the way I read the Bible, I believe that God simply does not want us to fight- even if war is justified, fighting and killing is still immoral. We cannot ignore the fact that when we drop bombs, we can never know for sure who we are killing. Thus, I feel God is a pacifist, against all wars and all violence, even though I know he sympathizes with those (such as Israel) who are retaliating against opressors.