Yes. There's a whole Politfact investigation here, did you read that? I mean, I don't want to derail the thread too much, but I think calling youth in gangs "superpredators" is dehumanizing and we all knew exactly who she was talking about when she said it, particularly because it was in support of a crime bill that disproportionally affected blacks and Clinton himself pitched it as something that would address violence in black communities. So yeah, it's racist as fuck to call them "superpredators," there's really no "can be interpreted" about it. And by the way, let's not forget how she handled a black protestor who confronted her about it:
https://www.cnn.com/2016/02/25/politics/hillary-clinton-black-lives-matter-whichhillary/index.html (Spoiler: They were removed)
As a reminder, rather than having security boot the BLM protestors from his event, Sanders gave them the podium.
Meanwhile, I don't see Bernie's comment as "openly racist" in any way, it just sounds like he's way more worried about getting votes from problematic people and the phenomenon of radicalization through conservative media/campaigns, which is causing him to fail to judge the people who end up being radicalized as what they are -- new converts to the cause of white nationalism, a.k.a racists. Someone with more empathy for the black community than Sanders is showing would never have put their foot in their mouth this way, but it's not like we don't all know someone in our family who got fucked up by watching too much Fox News and broke bad.