>>211873855 (OP)"Japanese people" don't exist any more than any other "we".
And for one Nip-kun that "forgave" Americans for some objectively recorded, but ultimately vaguely and off to the distance crimes that some people did to some others in the past, whether because he's so remote to it all, or because he doesn't care, another Nip-kun doesn't.
Especially if the latter one knows what some Americans did to Japanese women after WW2.
Yet even the latter Nip-kun can be detached, and just be pissed off at some data in a book
Does some Joe in US care about some events here and there? Yes, no, maybe. What matters is the extent of their stakes in things. An opinion of your usual commoner isn't a good example of long-term civilizational choices here.
This sort of population assessment is really basic, it doesn't work, don't bother with it. Judging peoples as any "we" is for monarchs and special situations.