This is the narrative currently being pushed, but let's not forget its weaknesses:
- A blue-collar senior in Appalachia is really unlikely to have enough contact with those "liberal college students" to be bothered with their constant references to Judith Butler etc.
- If the issue is with racism or homophobia, I don't see a compromise happening: minority rights aren't subject to popular approval. Democracy isn't two wolves and a sheep deciding on dinner.
- Trump voters are by and large not the poorest. The white guy with missing teeth living in a trailer is the wrong cliche, because he's unlikely to vote at all. These are conservatives, many retired.
- Every time some politician talks about "real America", he's trying to delegitimize liberals. I fail to see how that is less insulting.
- People who decide to punish the weakest of the weak, just because it's a convenient way to annoy me, are indeed worse people.
- The left should get back to talking about economics, yes. But I doubt that these voters would appreciate it, seeing as the last time the left made the case against neoliberalism, most of them probably complained about "the smelly hippies who should get a job instead of taking about some 99% or 1% BS"
- there are quite a few improvements for a factory worker who lost his job that the left has implemented, or would like to if not for a complete boycott of government by the right: universal healthcare, universal income, consumer financial protection (payday-loan and similar specifically targeting poor people). Strong anti-trust regulation. Redirecting money from the military to investments in infrastructure/education/health...