Could it be because nobody had yet discovered the "German extermination camps or death camps and killing centers that were designed and built by Nazi Germany during World War II (1939–45) to systematically kill millions of Jews, Slavs, Communists, and others whom the Nazis considered "Untermenschen", primarily by gassing, but also in mass executions and through extreme work under starvation conditions . . ." ? See https://en.wikipedia.org/wiki/Extermina ... ust_denial
Why did the post World War II US propaganda film about "Our Job In Japan 1945 US Army; Post World War II Occupation of Japan" at https://www.youtube.com/watch?v=czW1IJ- ... 836.070406 recommend that the Japanese be treated more humanely than the film at https://www.youtube.com/watch?v=Rv1yZ6tq3mY recommends that Germans be treated? Were there too few Jews in Japan for the Japanese to be accused of a "Shoah" too?