lol!
Many reasons.
One being that people would rather be Politically Correct than factually correct.
The other being this: the Dems WANT blacks to be poor, nay, they NEED blacks to be poor and they need to blame this poverty on whitey.
Black people don’t need a Boogeyman...they are quite capable of screwing up on their own and as soon as the world starts calling them on it, the sooner the repair can begin...