Is "black" a culture? Are the Somalians the same as black Americans? Are the Kenyans the same as the Nigerians? Is there really a "black" culture? I think what you're actually talking about is black American culture.

Your justification doesn't make sense. It's just ideological gobbledigook used to try and elevate black people above white people. Which is what the left-wing ideology in the USA does constantly.

Treat all races the same. And you will get less racial tensions.

If I were to start capitalizing White and not black, I would immediately be attacked and called a racist. Yet for reason, you seem to think it's acceptable the other way around. It's not.