About the mass raping, the Soviets are probably far more responsible for that one. If I remember correctly, reading from Wikipedia, Nimitz admitted unrestricted submarine warfare in the Pacific.
WW2 Allies When
It Was Time to
Talk Axis War Crimes; WW2 Allies When Asked
About Mass-Raping and
Firebombing Civilians; Something Nuremberger; OzwinEVCG