When you're a hammer, everything looks like a nail.
The reason white working class voters have been such a topic of discussion is that they were a change. Democrats and Republicans have learned that certain demographics will always go their way, and so are content to ignore them. Clinton took one group for granted, they turned on her, and she lost. Everyone else voted the way they always do. The reason working class black voters aren't part of the conversation is because they did what was expected. If they'd gone for Trump, we'd now be reading article after article asking why. Meanwhile, the Democrats have taken their votes for granted, but this is apparently something black voters are willing to accept, so why should the Democrats pay them any mind? The squeaky wheel gets the grease.
If black voters want the Democrats to pay attention, stop with the blind support. Vote third party.
Ultimately, I wonder what his point is. Sitting there yelling at white people for being racist may be cathartic, but all he's going to do is annoy people who might otherwise have been persuaded. Say he's right, and whiteness is how I got where I am. Now what? What would he have me do? What would he have any of us do?