I can't help but feel like this is a silly ass discussion.
The Samurai is a symbol of Japanese culture. So is the Geisha. Most Japanese people throughout the country's history have never done one or the other but it doesn't make those things any less Japanese.
So to say that Hip-Hop, Jazz, Soul Food or African-American vernacular english is not apart of an understood, established culture is laughable.
African-American culture is simply the uniquely black interpretation of American culture. Some would say Its an American sub-culture instead of an independent all-encompassing culture of its own but you can say that about literally everything. American cuIture is a 'sub-culture' of western civilization. I just think people are so used to shytting on black people, they don't realize it.
Well said. Rep my friend.