[jevgeni]

I don't think this is a moral question, but rather a question of reality. Black culture does not exist globally. Black culture of the United States does exist, because black people in the U.S. have a common history and common societal experience that binds them together.

White people are too diverse a group to have one single culture. I am white and not from the U.S. Based on these facts people cannot guess what my values are, what my traditions are, whether people of my ethnicity were ever opressed or were the opressors, or even what language I speak, or what religion I have. Hence the term "white culture" does not make sense.