There are many things that have been introduced into the greater American cultural process from other places and other peoples, and Africa and Africans, enslaved or otherwise, have certainly contributed their fair share. However, I think that throwing all of these things out or saying that only people of a certain racial background and skin of a particular shade of tan/brown (BTW, there are very very few people who have skin that is either "black" or "white") can use them is a bit out of line. Eliminate the banjo? This is an instrument that may owe its origins to the banza of the African slave (which probably looked more like a balalaika), but has both evolved physically and has become integral to many kinds of folk music.

Azizi mentioned use of African American slave dialect as one of the racial no-nos. What, exactly, is that? "Sho-nuf"? "Massa"? "Lawdy me"? As a light tan person of (mostly) Northern European descent, raised on military posts in the northern and western US, these are expressions that I'd associate with other light tan people of Northern European descent from the deep South. The medium and dark brown people of African and mixed European and African descent that I knew growing up mostly spoke what I'd call standard Midwestern English.

The Black Americans that I know and most respect are those who have been able to both acknowledge their own history and integrate into the larger American culture. They know the difference between someone who does not share their heritage using "their" expressions either honestly or disrespectfully. I heard a Navajo tell an Ole and Lena joke last week. Was she purposely insulting Norwegians? I don't think so.