Now, I think we're closer than ever to a real split. Covid has exacerbated it all. People are self-sorting in terms of migrations from blue states to red states, and from cities to suburbs and rural areas.
This summer, and the elections in November, could be flashpoints of something larger and worse -- I hope we can hold it together.
As for HN toxicity -- beware items whose number of comments exceeds the votes for the article itself; it's a rough metric for how big the flames are.