SDMB’s rules implicitly do not consider pejorative comments directed at groups identified by political affiliation to be prohibited:
Hate speech. Do not post hate speech directed against any race, religion, ethnicity, nationality, gender, sexual orientation or other group identity (except for political affiliation or leaning) in any forum.
Likewise:
Now, if you want to argue that it should be prohibited, then I’m still waiting for you to convince me that there is a problem, much less that it needs to or should be solved.