It can be pretty unmanageable if you don't know how to deal with it. I'm half Spanish but I have inherited the texture of hair from the dominant African-American roots on my mother's side, and because it's so thick, it can be a hassle. I've switched to a perm in the last year and a half because pressing it had become too much for my mother. I love my hair, though.
two reasons come to mind. All things associate with black people in the US used to denigrated. Two, historically wearing your hair in it's natural state was seen as unprofessional and backward....most likely because they watched all the same bigoted programing and read the same books showing Africans as being savages.
I'm not the guy to ask
Oh I got more hair then I know what to d with I'm just not black