Second, we're talking about cultural/racial superiority, not specific attributes/skills of one individual.
But this is what you said:
I'm not sure. I don't see how I could have a constructive relationship to someone that thinks that they are superior in any way.
"in any way"
I can only go by what you say.
Anyways, I think you are kinda implying that you would be okay with Usain Bolt thinking that he is a superior sprinter to you. Certainly it would not be
"racist and hateful".
Now if Usain Bolt was of the opinion that being a fast sprinter is the overwhelmingly most desirable attribute in a person, would that be
"racist and hateful"?
No.
If he had the opinion that a person's "level of worth" is determined solely by their sprinting speed (i.e. faster sprinters are superior people to slower sprinters), would that be
"racist and hateful"?
No.
Now suppose Usain Bolt learns that black people are superior sprinters to any other race; surely gaining some knowledge is not
"racist and hateful".
So here we have a black man who thinks that the black race is the superior race. At what point did he become
"racist and hateful"?
The answer is that he did not become racist or hateful at any point. He identified a certain attribute that he feels is the most important attribute in determining a person's worth, and he learned that this attribute is strongest in a certain race of people.
And there is no logical reason to condemn him for thinking that way.