Maybe not you but concern over him praising aspects of Communist regimes is hardly the only attack on him. And unlike the grievance about "Bernie Bros", which is just about schmucks on the internet, this goes up to the Democratic leadership and their pals on the MSM.
“I'm a Democrat," Cuellar said Tuesday. "I think it would be difficult to have a socialist at the top of the ticket. I think he clarifies it and says 'a democratic socialist,' but a socialist is a socialist, whether it's Republican socialist or democratic socialist, if there is such a thing.
“I’m not a socialist. I’m thinking about printing T-shirts saying as much. I think socialist economic policies fail, inevitably,” said Rose, another Bloomberg backer.
“I will support Bernie Sanders if he is nominated against Donald Trump; I will do so enthusiastically,” Peters told The Hill on Tuesday, while adding “I don’t think … putting a socialist on the ballot is a good strategy to defeat Donald Trump.”
I can imagine if you're in lockstep with the party, you won't have negative nicknames for them, but I'm not in lockstep with Bernie either. Relax.
I've seen plenty here argue "He's not even a Democrat", which I'm assuming is an attack on his policies being fringe/radical (i.e. not aligned with the Democrats)/ Socialist vs. Democrat. Nobody here saying that would have cared if he was Independent yet had Biden politics.