Systemic racism in the US: Why is it happening and what can be done? Is it presentism though? What were the prevalent ideas on race, racism and race hatred in the 30s and 40s? It was certainly more widespread but was it acceptable? What were the Nazis accused of with respect to the Jews and their idea of the "ubermensch"?
Who said this?
I do not agree that the dog in a manger has the final right to the manger even though he may have lain there for a very long time. I do not admit that right. I do not admit for instance, that a great wrong has been done to the Red Indians of America or the black people of Australia. I do not admit that a wrong has been done to these people by the fact that a stronger race, a higher-grade race, a more worldly wise race to put it that way, has come in and taken their place.
And people around him were aware:
On the subject of India, Winston is not quite sane... I didn't see much difference between his outlook and Hitler's — Leo Amery
It's not so black and white in this case. The "crime against humanity" convictions for the Germans were based on: Murder, extermination, enslavement, deportation, and other inhumane acts committed against any civilian population, before or during the war, or
persecutions on political, racial or religious grounds in execution of or in connection with any crime within the jurisdiction of the Tribunal, whether or not in violation of the domestic law of the country where perpetrated.
If you look up "Bengal famine" then by that definition Churchill committed a crime against humanity by standards they were only too happy to retroactively apply on the Germans in 1945.