I find this last bit, that it is a vast majority, hard to support. I meet quite a few of them, and they seem mostly unaware of the news - and by news I mean matters of public record, or easily verified facts. So there's ignorance, but they are mostly decent people who are easily duped, not scum. I would suggest that lack of education (especially in civics, social studies, and basic science) causes a lot of them to just give up on scrutinizing the assertions made in culture wars and policy statements. Add in the siloing of cyberspace, and you have an idiocracy.
I go back and forth on this. Sure, some 15 to 20 percent are simply incapable and I don't really fault them. As for the rest? They're smart enough to know better. They're connected to the internet 24/7--way more than me, incidentally, I don't have a stupid phone and we don't get coverage where we live anyway--so how can they possibly be this ill-informed? The answer is not that they're falling prey to these massive disinformation campaigns--again, most people are not that fucking stupid. (And if we're gonna pretend that people really are this fucking stupid, should we be trusting them with... well,
anything? I mean, do you really want someone who is that fucking stupid pumping gas, say?) Their ignorance and stupidity is very much willful. They're selfish, entitled, bigoted pricks. And, yes, they are that way because that's how they were brought up. But like I said, most serial killers and other monsters also had shitty upbringings--that does not exonerate them.
Also, they're uneducated and do not know how to think critically. Surely they possess at least
some awareness of this (and show me the non-joke science on Dunning-Kruger). So why the fuck are they voting? I don't do dangerous shit
that I don't know anything about, because I don't want to get anyone killed! Funnily, I'm fairly confident that most of the people I'd get killed, I wouldn't even
like in the first place--and, yet, I still don't do it! Yet these people
do, and by my definition that makes them fucking scum and pieces of shit.
Edit: I was gonna add that while these people skew towards the poorly educated, they are
not, in fact, the working poor. Trump supporters are largely petty bourgeoisie, and not proles. Consider January 6: Poor people do not just drop everything on a dime and travel to DC to storm the Capitol. That takes some measure of financial security. But this is another subject entirely--see post-Weimar Germany and the rise of Naziism.