I'd like to hear your solution to ending a war with a defeated nation that believed their ruler was a god and that surrender was unthinkable. As far as killing thousands of innocent people is concerned you might find the following interesting reading:
https://en.wikipedia.org/wiki/Japane...#Mass_killings
https://www.ranker.com/list/japanese...mes/mel-judson
If there was a simple solution to a nation that had such a mindset I've yet to hear it.