I suggest you read the biography of Sir Weary Dunlop... he and others was quite aware of what kind of depraved government the Nazis was before WWII.

It was quite well known how racist they were, to pretend ignorance of what they were about is not a factual account. Nor after the many cleansings in Russia could the German soldiers be naive of whom they were fighting for.

Revisionist history in this manner is not a good thing.