I think they're extremely unsophisticated folks that just want to confirm their SocDem biases and sometimes that means a religious belief in a radical US working class. And per the screenshot, often limiting one's understanding of liberation to the issues of proletarianizan now faced by white people in the imperial core, issues they absolutely did not and do not care about wrt anyone else. Healthcare, housing, shit wages, insecurity, etc. They saw Bernie, said, "yeah", and then entrenched themselves and punch left rather than engaging with the basic facts of imperialism. They fetishize discourse and then act like babies during confrontation.

Occasionally they fool themselves into thinking that they're actually socialists just trying to approach the working class on terms that will resonate with them, and this they view criticism of SocDemery as getting in the way of progress to socialism. A ton of trots think this way and there is a lot of trot thinking at Jacobin/the DSA, conscious or unconscious. DSA was founded by an anticommunist trot and the big influx of Bernie supporters are struggling to self-radicalize in a context where struggles are framed in watered-down trot language and thinking.