Get real here, you all are trying to subs ute reality with knowledge.
If Barack Obama, BARACK HUSSIEN OBAMA, was walking down the street as a regular joe and asked anybody, white, black, mexican, whoever, what his ethnicity was, NONE of them will say that he is a white guy. Over 90% would say he is a black man.
Black people in America is a mixed bunch for people of color, not just African Americans that gets thrown into that category so Barack Obama inlcuding myself are black folks.
Also if you wanna get legal about it, you determine your ethnicity by who your father is anyway.