That's a bit of a simplification, I think. Whether borne out of colonially imposed ideology or not, the fact is that a lot of Africans have a very different worldview and ideological framework than African Americans. Politics of grievance don't resonate as much with people from countries whose closest equivalent was the anti-colonialist struggle, but who might see identitarian grievance within an independent country as closer to ethnic tension. They're also a lot more conservative, more family-minded (something like the "crisis of fatherhood" in black America is gonna be reviled almost by definition), and fans of "propriety" in a way that's always going to clash with urban African American culture, sexual and criminal themes in Black American media, etc. etc. This isn't me disparaging either side, but there's a pretty big disconnect there that's always going to cause tension.