Good post.
Also note that Germany’s representative in Nanking, China, during the 30s wrote to the Fuhrer regarding the appalling behavior of the Japanese invaders in Nanking. Surely, Hitler would be appalled, too. Hitler, at that time building a positive political relationship with Japan, did not respond compassionately to the letter.
John Rabe was the nazi rep in China. I believe he spent some time in jail over his complaints.