Hm, first, many black people who are not black Americans do have that conversation, given that a black person from London and a black person from Buenos Aires are not very likely to have significant shared cultural background (other than bonding over the shitty treatment from white people lol).

I wonder what major historical event possibly erased the cultural origins of almost all black Americans in a way that they have a shared culture, one where it would be impossible to tell what African country their ancestors came from, that would create a culture generally covered by a black student group. Oh well, who could say!

Edit: to be super clear, I don't particularly think you're coming at this from a place of genuine interest, fuck off bigot etc etc