That was because they had been repressed. So when they were given equal rights they were still very well adapted to society and felt the need to prove that they could be just as good as Whit America.
But then came all the black power movements and they were all rooted in communists and U know who that came from.
I am sad to say it, I feel like a broken record. But the Jews didn't only bring the Africans to USA, they were also the ones who weaponized them against U