In terms of white Sanders supporters v white Hillary supporters...sure, I think we all remember some suspect shit coming from white Hillary fans when Obama was beating her. And I'm sure someone could find a 2008 "Hillary has done more for black people than Obama" think piece. But overall I think it's very hard to deny Sanders fans are far more confrontational and dismissive of black views than Hillary fans were in 2008. Multiple outlets have reported on Bernie fans and their problems, I don't need to re-litigate those arguments. And no, this does now mean ALL Bernie fans are like this.
I actually agree with Sanders' view that an improved economic situation would greatly benefit black people. A lot of inner cities are in disrepair in large part due to deflated tax bases. Liberals can inject cash into inner city schools every four years all they want but the problems persist when tax funding is low and people don't have jobs. The problem is that Sanders hasn't really made this argument to black audiences effectively, and often outright ignores local issues that can help his point. He wants to talk about Flint, MI by hitting Wall Street. It doesn't make any sense.
But as I've said, Sanders has no connection to the community. He made no attempt to make one. And no, I'm not talking about his BLM confrontation; I still have no problem with how he handled it, and you know my views won BLM. I'm talking about having a visible presence in the community, be it through meeting with activists, attending black events, etc etc. All the things Hillary has attended for decades, mind you. Remember, both Obama and John Edwards made these overtures as early as 2006-2007 in preparation for the 2008 election. Because they understood you can't win the nomination without the black vote. Sanders did none of that and instead showed up in late 2015 talking about MLK. It's not surprising why it didn't work.