I think its because all the European ethnicities have cultural differences that are passed on to their kids. Italians eat, speak, act, dress different than French, English, Spanish, Irish, whatever. For most black people, they don't know what country they come from since all their culture was destroyed. You find a group of black guys, its not like one is gonna say he's from Ghana and another one is a Rwandan Tutsi and another one is from South Africa...cuz they don't know. They don't know where they're from, what their culture was, anything like that, so they just say black.
I remember when I was in Cali talking to my cousin's wife. She got hella offended when I said I like Asian food, since out here most Asian restaraunts serve Chinese food and Sushi and Pad Thai at the same restaraunt. She was like out here "Asian" doesn't cut it, cuz we got Chinese, Japanese, Filipino, whatever that hang onto their ethnicity.
I remember when I was in Cali talking to my cousin's wife. She got hella offended when I said I like Asian food, since out here most Asian restaraunts serve Chinese food and Sushi and Pad Thai at the same restaraunt. She was like out here "Asian" doesn't cut it, cuz we got Chinese, Japanese, Filipino, whatever that hang onto their ethnicity.