When someone comments on an issue that is directly and physically endangering me and people I love, and their comment is a gloat on how the awfulness proves their opinion was right and their opponent was wrong, I don't view that commenter as an ally to me and my community. Sorry so brief, word limit

Yep, that sounds like a good description of the problem.
Taking it back a step, it seems to me that having so much power invested in one person's position is a problem in itself. In Australia, the Prime Minister is simply whoever is leader of the party that forms government, and has little power.

I'm very uninformed about the US political system, but I think perhaps that's the only way without making bigger changes. Here in Australia we have preferential voting, so you number your preferences instead of voting for one only. And in many countries the parliament is multi-party.

I think you need to fix your electoral system so voting outside of two right-wing parties is not a waste of votes.