The lesson learned doesn’t seem to have been that killing large numbers of people because of their etnicity is bad, but rather that killing large number of Jews for their etnicity is bad, but doing it to members of other etnic groups who are still seen as untermenschen is fine.

Basically (and forgive me the racist terminology but I think is representative) they’ve just reclassified Jews as “whites, like us” and carried on approving violent racism against those they see as “not like us”.

Fascism might have been kicked out of Germany, but it seems to never have left the hearts of the German elites and many of its people.