These people are just not ready for prime time. This shit may or may not help/hurt them in their own races, but the fact is, this absolutely hurts the Democratic Party brand. Having someone flounder while defending terrible positions to a large audience that includes swing voters is enraging.
Aaron RuparFrancesca Hong was just on Fox News getting grilled about her onetime support for defunding the police and current support for other DSA-endorsed positions. Here's the full interview.