This is bad faith and not a serious position.

During WW2, the Allies used flame throwers for goodness sake and killed a lot of innocent people taking Europe back from the Nazis.

If you made this argument in the 1940s, you would've been dragged out of your home and beaten half to death. And it would be for good reason. :)

There's no pseudo-intellectual moral argument that stands up to might-is-right. In the real world, that's how it works, regardless how much you disagree.