You obviously missed my point. Adherence or nonadherence, Hitler’s motivations have no effect on the evidence.
I think the point is that the evidence had a great deal of effect on Hitler's motivations.
Creationists may be using Hitler to discredit Darwin, that is true. But the evidence suggests that Darwin's ideas DID influence Hitler and a lot of other eugenicists ... even to this day.
This is not an attack on the validity of Darwin's ideas. But it is one of MANY disturging outcomes from them. Biological determinism has proven to be a dangerous concept in practice.
Stating so isn't all that controversial.