You are completely correct, but the reason the west holds up the jewish holocaust (which I specifically say because jews made up a third of the victims but libshits don't acknowledge the others) as a uniquely horrific crime is that it's an aberration. Most of nazi germany's crimes were common among western fascist and imperialist powers, mainly destroying entire communities under the guise of war or civilisation. If the crime is the number of victims, people might start questioning whether it means this english king, that belgian one, this usian president etc are comparatively wicked. Therefore they must pretend the greatest villainy was the gas chambers and furnaces, because everything else, the robbery, the slavery, the camps, the murder; other western powers have done it too.

The exception to this is obviously ex-USSR, in which it may have been better to tell the story of the heroism of the soviet peoples. That's just a guess though.