Interesting. I believe it is safe to say that blacks in America trust government far more, on average, than whites do. They have a more positive view of government. They certainly vote for big government every single election. I think I have seen an actual poll but cannot remember where. It seems that black parents simply believe that educating their children is the "government's job" and that the government will take care of it.
In contrast to this, I have also read that the number of black homeschools have gone up dramatically. So perhaps some families are getting the picture.