I dump on Omar and the rest of the squad as a middle-left Democrat for the sole reason that they are costing the left many centrist voters who otherwise agree with us. I also think that the extreme stuff that they push is actually bad and would hurt people.

It's fine to be an extremist, I am as well along some axes. But it is just dumb to think that everyone who is not as extreme as you is a Republican/fascist/communist/white supremacist/critical race theorist. Worse, it hurts your cause by tainting the center-ey people who can actually get things done with the stink of rabid activism.