If you want to avoid the noise of debates like this, partly caused to divert attention away from something else, look at Russia during WWII.
They did everything Hitler did, had the same plans, ethnic cleansing of whole populations, and kept the concentration camps they captured from Hitler going. Russia was also responsible for inflating the figures of the concentration camps in their captured territories, because it benefited them to do so - it provided a justification for seizing eastern europe.
History is written by the victors. And one of those victors happened to be Russia.
In fact, they gained the most from the war. We even had a general assassinated over it.
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