Sorry, I did miss that part and I made a bad assumption. I thought you were making the cliche point all over again.
I don't feel like there's a specific culture a person has to be part of to be black. I always felt like you're black no matter what you do. Like, white people are always white no matter if they're upper class from the city or lower class from the country. Even with radically different cultures, they're always white. The same thing applies to black people, no matter what culture you do or don't subscribe to.
Nothing you do can make you any whiter or "whiter" in quotation marks. I mean, the culture you're speaking of... the one I think you're speaking of, it's not owned by whites.
But I wanna leave this discussion alone, I feel like it's mostly a semantics issue more than anything else. It's hard to express what you mean with this kind of topic.