Of all the things you could critique DSA on, this is the hill you're going to die on? 
DSA deciding to do a mask mandate at this event is unequivocally good and based. Shut the fuck up, you fucking dipshits.
Imagine being this much of a fucking goddamn crybaby about masking. Eat shit, you ableist fucks.
One of the biggest lessons this pandemic has taught me is the astounding number of people for whom leftism is really just performative, and that when push comes to shove, these people will make the biggest fucking stink about having to do something even mildly inconvenient for even a single fucking event or context and show themselves for who they really are.
Fwiw I only refer them as neokauts because I see a lot of them identify as such on twitter. But yeah I looked up their onboarding school and they make their members read more lenin than they do kautsky. That might be too revisionist for some people here's taste but I think them, red star, and even b&r making up a left-majority steering committee is a good thing.