You mean the theory liberals (intentionally or unintentionally) seem incapable of comprehending?
I'm sure the guy who called the NFL "N***ers For Life" would be a solid Democratic voter if only they proposed seizing the means of production. Lol
I mean, I'm sure many people who used the n word casually happily voted for the same Democratic administrations that enacted the CRA. Heck, they even voted for Obama! (and you are right in the sense that just believing they are leftist sleeper cells is also delusional)
Look, I'm not black so I'm not going to go too down this route. But to bring it closer to myself, if I'm honest with myself a lot of traditional Labour voters probably think that trans people are weird and would make crude jokes about Thai ladyboys or whatever. But at the end of the day, I don't care what they personally feel, as long as they vote the right way. That's the nature of political coalitions.
The vast majority of people are not so bigoted that they are willing to sabotage themselves to prove some point. If the Democrats offered a coherent solution to their problems, then they will vote for them. But from their perspective, they don't, nobody does; and so why not vote for some moron? Politics doesn't matter.
Indeed, the main problem with these articles is they seek out the Trump-lovers, and ignore the far more numerous types in these areas: the non-voters. Probably more useful, although I imagine they don't jump out and gab to Politico journos.