Also exemplified by the American comments in this thread.

I suspect survivability bias plays into it, as I imagine an empathetic and self-reflective anti-war film in the is more likely than a straight "US are the villains" film to be funded and see financial, and therefore popular, success in the US. It makes sense why domestic industries will tend to tell domestic-facing stories. I'd say the size of the US film industry means you actually get more diversity in war films compared to ones you see in places like Japan or Germany.

The anti-war statement is directed at the psychopaths doing the bombing. Showing them how people are suffering after being bombed doesn't affect them. Its an attempt to show them how they might regret their own decisions. At the very least it might chip away at the people who support them.

I'm not sure how well received it would be if Americans tried to make movies on behalf of the others saying how they must've felt. Safer to stick to their own perspective