Poe's law strikes again: I'm genuinely unsure if you're intentionally being ironic in perfectly illustrating OP's point, or if you legitimately think that "the Right" is single-handedly responsible for creating the sociopolitical tribes that can't stand or even understand one another.

If you're being ironic there's not much to add, so on the assumption that you meant what you said: Trump's ascendancy is evidence of what OP is saying, not the cause. The coastal elite has been completely incapable of understanding Trump's voters for decades, long before they were Trump voters. Trump hijacked the Republican party and won the presidency (twice now!) because he managed to make these long-neglected voters finally feel understood. We're not going to solve the problem of Trumpism by doubling down on treating these voters like idiots, because that's what got us here in the first place.