Simon as I've said before this is not a zero sum endeavor. I agree there are serious problems on the left. That doesn't negate the merit of this march. I have also not compared trump to Hitler. Some have and their wrong at this point. To say he is no worse then Reagan is hyperbole as well. Again their has not been a President as dangerous as trump is in the last 100 years if not the entire history of the U.S.
When the center left condemns a large portion of their own as loons they are pushed directly into to extremist hands. That is what I'm worried about with these types of general condemnations.