According to Hitler, why is the Aryan race far superior than the other race?

Alright so Hitler was a smart man but he misused his intelligence and now he rests in squalor, I wonder if a man like him can rest. According to Hitler, the "Aryan," race is superior to every other race because of genetics, he was also a fan of eugenics meaning he thought he could breed humans with other humans with to achieve desirable traits. Later on, we established that race is a social construct and has nothing to do with biology as a matter of fact, humans share 99.9% of our genetic makeup with each other. Point being, the nazi was wrong.

Explanation:

I know some things about history.

it may be touching on the issue of over sexualizing all women