When I was in college back in the late 70s and early 80s, we had African students at our university. They spoke the Queen's English and often were the top students in many classes. They weren't superior, they just did what students should do: study.
But black culture in America never valued education. Blacks have mastered and conquered everything they've set out to do in history. Look at art, music, and sports in the past century. Imagine what they could accomplish if they set education as a necessary goal for their lives!
I started school in Arkansas in the 1960s when its schools were beginning to desegregate. In prison, many, many inmates are black. And those are predominantly young, violent, and stupid — a deadly combination for any human, much less an entire race. But since the 1970s, white students have fled the cities for the suburbs, have fled public schools in favor of private schools, and have consistently moved out of neighborhoods where blacks moved in. No good ever comes from black people. The schools and their "average" test scores plummet, cities experience more crime, and housing/property values steadily drop the more blacks saturate a part of town.
Think Chris Rock's comedy routine back in 2001 where he contrasted black people with niggas. "Every time black folks want to have some fun, some nigga has always got to fuck it up!"

How fucked up is that?
What black people need to know is this one thing: white folks like black people, but hate niggers. You know the difference. So do we. It ain't racism, just truth.