It is an assymetric issue - the right radicalized far far more then left. And spend years demonozing anyone left of center, demonizing groups and now is actually sending thugs to be violent.

There is no left equivalent of that.

> The "demon-crat" attack is roughly analogous to the left's "nazi" attack

Abaolutely not. One is a name of political ideology. Calling them nazi is an attempt to describe their believes and behavior. It is a name consistent with reality. (Hey, some high profile ones even throw Hitler salute in public and we have enough of Hitler praise coming from lower profile ones).

Trying to pretend it is the same is absurd.