Lemme ask you this.
Do you not think it's likely, if left wing people changed the language they used or otherwise addressed these reasons you highlighted (or likewise if right wing people did the equivalent), that because there was still profound polarization and disagreement, people would kinda find other things to complain about?
If you accept that premise, then does it really matter what things the people who you disagree with do that grind your gears and what it is you find grating about them?
Isn't it more important to try and have a productive dialog, despite finding the people you disagree with grating?
I think almost always when there is something about the way someone expressed themselves that bothers you, it's more a reflection on your preferences than anything else, and it's best to set it aside and try to hear them out anyway. There's no obligation to do so, I'm just suggesting it's the pragmatic and productive thing to do.