This has nothing to do with minorities and everything to do with an underclass and a broken educational system. Unless you consider uneducated rednecks or hillbillies who speak just as badly, minorities, you are way off.
but those "red neckS" know they speak with a southern accent.
They do not pretend idoms are a seperate "language".
This professor is using her status to push "blackness" as a seperate language as a power tool.
Just like the hispanic people are pushing mandatory spanish upon the government as a tool of balkanization.
If it has nothing to do with minorities, then why don't we hear, hispanics, caucasians, asians, etc using ebonics? An underclass? No such thing. You want to get ahead? Study and work.
Broken educational system? I'll only give you part of that. You can still learn how to speak English in school, you just have to want to.