Do we use it as an insult? Or is it just an insulting thing to be called because being a liberal is bad and embarrassing? Do proud liberals actually take it as an insult? When I call Bibi a fascist, I'm not insulting him- I'm labeling him accurately.
Do you mean turning it into a pejorative like with shitlib? Do you mean that we should stop insulting liberals?
Regardless of those semantics (which I am asking about genuinely and am curious to hear your thoughts on):
I feel like it's a double edged sword- social pressure, guilt, and shame are all really effective at influencing people. I want liberals in our spaces to think "Oh shit, should I be embarrassed to be a liberal?". I think radlibs in particular are a perfect target for this- surely if they realized how embarrassing it is, they'd move further left?