I'm sorry, but the "shouting" comment was tone deaf. I do not believe Sanders is a sexist. However, one does not have to be sexist to say things that have sexist overtones. An inability (or refusal) to see that is an example, in my opinion, of privilege. Something I, myself, a white male have been guilty of in the past. While watching the debate with my mother (who was leaning Hillary going into the debates, but was probably closer to undecided), her initial reaction to Sander's comment was "Of course she's shouting, because she's a woman!" It's a common line of attack levied against women who speak their mind. Sander's campaign's response to it has been to clutch their pearls and act shocked. Some of his supporters just pretend its a non-issue.
Is Joe Biden racist? Of course not. However, he said things that had a racist over tone when he called Obama "clean" in 2008. Our words, and the way we frame them, have context. Bernie Sanders is not exempt from living in a world of context. His campaign then went out of their way to make it look even worse for themselves. Which means he's either letting them control his message, or they're all incompetent. As I mentioned in my post, this is one reason I wouldn't support him, and why I wouldn't trust his campaign to sell socialism to the mainstream. If someone slightly mischaracterizes him, what are they going to do? Explain to all of us how we're all wrong, and Bernie knows best?
Politics involves the art of perception. He should know that, and his campaign staff should definitely notice that. One of Bernie's greatest problems is that he fails to understand, even at a fundamental level, the basics of intersectionality.