“I have to hand it to the Germans - they have a much better PR operation going.”
They also had technology we needed, with the possibility of the new Soviet enemy getting control of it. That, and the much-needed buffer between Europe and Soviet territory made for a completely different political situation.
Many times, Japanese leaders paid the price for the actions of subordinates, as well, such as Yamashita being executed over atrocities in Manilla, that were committed by a subordinate who refused to follow orders.
The execution of the Tiger of Malaya was a political hit job. Had the principals that got him executed after the war been applied by the U.S. to My Lai, Westmorland would have been tried for war crimes.