I don't really feel I'm a 'deathhead', more of a 'face_reality_head' if you like.
It is the same argument that war or killing is always wrong.
According to your argument, if power is used to do something wrong, then power therefore can never be used to do something right.
You make the argument that all uses of power are morally equivalent.
There are just wars, and non-just wars. The liberal peacenik makes no distinction.