Damn, ERA really does have an anti-semitism problem, people in that Omar thread calling for the abolition of the Israeli state.
Not just Era most of the left has that problem.
It basically comes down to:
Progressive: "Look people are sick of 'conservatism' we should challenge them in politics!"
Liberal: "Ok Ok, what's the first thing we do? Healthcare, free education?"
Progressive: "Launch a plan for higher taxes and a ban on all cars. Also abolish the military and border police and tell everyone how nice Hamas is."
Liberal: "Brilliant!"
This is not even limited to the US. The left in Europe has that same problem.