Black Americans are not our own "Race".
We are our OWN Ethnic Group, within the "Black Race".
The World hates Black Folks(All Black Folks), but if you know history, you will know that this is a RECENT Phenomenon.
"Whites" have went overboard with Anti-Black Propaganda, and Media to demonize Black Folks(ALL Black Folks)
But to answer your question about Black Americans...
It is because we are the MOST VISIBLE Black Population, the current "Pop Culture" of What is "Cool" is based upon our Culture(s)
People Hate what they ENVY!