No this is the disconnect between idiots and people who aren't. Protesting someone that long advocated against police brutality, supported affirmative action and incentivized social policies for the bottom mean you don't understand shit about the real world and you just care about a particular topic while being myopic to all the things that are around it.
And for your information, a politician can't do much about people trashing resumees because of "ethnic" names, but he can ensure that the playing field is as even as possible with other measures. Racism is a matter of public perception first, economics second (which of course feedback in the first) and politics last. Economics and politics however can ensure that the effect of racists/prejudice on the society is diminished as much as possible, and as time passes, and public perception change, those effects will eventually disappear like they did for many other "minorities".
But let's throw the opportunity away because "he don't understand what it mean to be a black liberal". Fuck off with that shit. With any other candidate you're getting more money for the richs and you're gonna be happy because Sanders was just "another bourgeois old white man that don't understand us blacks, thanks god we elected corporate puppet n°1564".
The biggest enemy of black people in america is american's warped perception of what a "society" should be, with everyone for himself. A vision of society that, what a coincidence i'd say, serve only to preserve the status quo and keep the richs aboves the others, and black people on the very bottom because bootstraps and we can't afford dirty socialism in the USA.