I'm the one who gets to decide what threads I want to participate in. And I don't want to participate in nasty, name-calling threads. That's my choice. I have political discussions day in and day out on other message boards that don't devolve into insults. I see no need to post in discussions that can't remain civil. It's got nothing to do with the subject matter or what I have to say about it. But political discussion should be held between adults, and not name-calling four-year-olds.
If you see my departure from mud-slinging threads as a retreat on subject matter, then best wipe the mud from your own spectacles.