After all, what's happening NOW didn't happen overnight. It's got the weight of decades of concerted effort behind it. Racists and bigots have been running this table for hundreds of years. It didn't stop because we elected a Black President; it's not going to stop with Bernie.
Of course I want Sanders and Warren to be the standard-bearers of the DNC, but we've got Biden and Harris. And that's frustrating. I agree. Booooooo.
But there is not a magic bullet to fix this. We can't elect one perfect candidate and solve this mess in a single Administration.