That’s probably the case.
If you have homogeneous group ‘A’ over here, prospering and healthy,
and homogeneous group ‘B’ over there, floundering, failing, and in misery,
there would be the natural tendency to compare and find out why group A does better than group B.
If they’re mixed together, you can’t prove a correlation.
I realize not all blacks are like that but if you compare them to white counterparts as a whole the truth will emerge and its not because white people are bathing in large swaths of money; its just a cultural difference with our priorities in different order.