It's a powerful bubble, too. I checked in on thedonald.win at Thanksgiving, and they had a meme aimed directly at me: "So glad you could come take some time off during your busy day to come make fun of us. You must be a real piece of work" or something along those lines. I burst out laughing.
But the other side of it is valid too: People say that there's no point in debating with folks who are "True Believers," since it merely gives them credibility and legitimacy. It's valid; I just don't personally buy that. The way to change someone's mind is to try to see things from their point of view, and really walk in their shoes, i.e. allow yourself the possibility of you changing your mind. At that point, it seems like both people are in the right mental space to be willing to change.
Tough problem all around. I'm not sure there's any effective solutions, so maybe both sides banning each other and enjoying their respective bubbles is the best we can hope for, given human nature. I just try to take a positive view.
The country will likely settle down in a few months, so this too shall pass. It raises question marks about the next cycle, but at least it's four years away.