Tell you what, since you like to learn your history from books, I have some reading for you.
Start with Knights of Bushido, which describes the impeccable behavior of the Japanese in the China Incident and the Greater East Asian War.
Then read about the holiday activities of the Japanese Army in Nanking, China in December of 1937 and January of 1938. The Japanese Army had such a fun frolic then.
And then read about the life-saving activities of Unit 731 in Manchuria.
What point is your sarcasm trying to make?