It also points up why many of us no matter how liberal or progressive we are on vital economic issues don't instinctively trust him. I'm old enough to remember when old white guys who talked about doing right by the working class didn't really include women in their picture of that class -- and certainly they weren't thinking of queers or single women. It doesn't take a lot of imagination for me to wonder whether Bernie's mental image of the working class really includes people of color. I suspect Bernie's pretty good on my issues and even on communities of color's issues.
But for an awful lot of the people, people who are the contemporary working class, old white guys have to prove they mean it. They have to work for an awful lot of people's trust.
For what it is worth, if he's still in the game, I'll vote for Bernie in the California primary. I've even sent him a few bucks. I don't expect him to be the Democratic nominee, but he's playing a good and honorable role, demanding national policies to fight economic inequality.