Their candidate is deeply flawed and even the democrats are starting to see it.
I would expand that to say "their candidates are deeply flawed."
In years past, the white democrats used the black vote to get their majority, even though they didn't enhance the black community as promised. The black community followed blindly, believing their white masters would eventually trickle down some benefits for their support.
Now when the black candidate needs the white democrat support, it disappears. For sure Clinton felt entitled to the nomination.
The black democrats got tired of waiting for their due, and decided to go get their own. Good for them. We may never see the Democratic party the same again.
Everyone has talked of a third party. It may be the black party may arise from all of this, and use their new political power to align with whichever party will give them their due.
There already is a party that exists which is the best for the long term interests of black people, much better than the one they are loyal to now. There are members of this forum who see it, who are also black. There are black men and women in politics who see it but they are all a minority within a minority.