The fact that everybody has souls and is worthy of certain level dignity for that and should be taught the faith has nothing whatsoever to do with the temporal reality that different races have different sets of strengths and weaknesses, and that those sets of strengths and weaknesses can be scaled as superior and inferior.
Yes. I agree.
Genetic physical and mental differences is simply a fact.
Myself, at this point, I think the idea of supremacy--who is supreme--is a very subjective concept.
For example, I do not think that Northern Europeans are supreme when it comes to surviving in a natural equatorial environment.
It is clear that I am not a supremacist.
Although, if we want to explore the idea in this discussion, we could ask the question: Which ethnicity is the most supreme when it comes to living in a 21st Century technological world? Which ethnicity is the best adapted to that kind of lifestyle?