Can we just accept that all sides did terrible things in WWII and move on? Laying blame for events that were 75+ years ago at this point is just stupid.
Americans and British relentlessly bombed civilian populations (the bombing of Tokyo actually caused more death and devastation than Hiroshima.)
The Japanese brutally raped and pillaged China (most memorably in Nanking)
The Germans had the Holocaust
The Russians kept the nations they "liberated" and essentially forced them into the Warsaw Pact later on