Well, four or five states is too much.
But, some separation might be ok.
The big question is, would it be mandatory or voluntary to live in the new BlackLand?
Mandatory.
If not, in 100-150 years our descendants will be experiencing exactly the same unrest we are seeing.
Add in the fact that Blackland will be the Somalia of the Americas.
“”Those who do not learn history are doomed to repeat it.” George Santayana