We in the US have a long history of subjugating and violently suppressing the rights of black slaves (and every black person after outlawing slavery). The last few years have shown that the number of people who still believe that should happen is much larger than we suspected.
It's not a fetish - it's a straight up fight to end discrimination against a group of people.
If it wasn't for the rightwingers (American and otherwise) who want blacks to sit in the corner and shut up, or get attacked and discriminated on, there wouldn't be a problem.
All this ”we have long history is america black slavery blaablablah” is not any kind of a counter argument. By segregating people you are doing exactly the same thing what slave owners, south africans and those hillbilly right wing extremists do.