https://www.bbc.com/news/world-asia-46147777
In the US educational system you'll learn much more about the atomic bomb than Nanking or anything Japan did. I suspect this is due to China being a Cold War adversary. Chinese intervention in the Korean War makes much more sense when you consider China's security concerns.
No one wants hostile foreign troops on their border. I see parallels in Ukraine. Russia really doesn't want NATO to encircled them. We would have problems with Russian troops stationed in Toronto.
This is still recent history.
I recall a Filipino man telling me his grandfather forbid him from marrying a Japanese woman.
https://en.m.wikipedia.org/wiki/Vietnamese_famine_of_1945
It can be argued that had the war lasted any longer millions would of starved. In fact even if we just blockaded Japan, mass starvation would of killed millions.
The post war Marshall Plan is above and beyond one of the greatest things we've done as a country.