I doubt Arizona has a majority black school. A lot of people in the east don’t know about the demographics in the west. In California, 40% are Latino, 35% are white, 15% are Asian American or Pacific Islander, 5% are Black, 4% are multiracial. I suspect outside of the pockets of inner city blacks, California is maybe 2% black...and 40% Latino, and 15% Asian!
The whole “black/white divide crumbles when there are 3 times as many Asians as Blacks....
Anecdotal evidence, from what I have observed, is that blacks seem more receptive to the environmental factors around them than whites or Asians. So, in inner cities, because the environment is so bad, they are especially affected by what is happening around them.