I am confused by this. Is Mark Blyth suggesting that Republican policies, more so than Democratic policies, benefit "working-class," "non-college-educated white guys"? If so, what are those policies—and, crucially to Blyth's point, can his "working-class friends" name and at least superficially explain them? I don't have any answer in mind, and I am not quizzing academics whether they know a "correct" answer; I am asking whether large numbers of Republican voters have any beliefs or opinions about this.
If said guys prefer Republican economic policies, then their complaints about the left-wing focus on "black lives, trans rights, and the environment"—complaints that are surely racist/transphobic/unscientific—are at least the product of some calculation of their own economic self-interest. They have considered their own wallet, and that's what they choose to care about. They might be lightly interested in eventually living in a non-racist, non-transphobic, clean-air-and-water society, but those concerns rate a distant second for them.
If, on the other hand, they cannot name any Republican economic policies that actually help them, then their complaints are *primarily racist/transphobic/unscientific in origin.* They are not just delaying implementation of egalitarianism and science; they are actually opposed to those values. In this case, they're voting Republican simply because they don't want any lives or interests other than white guys and businesses to be recognized as mattering. What they gain from Republican politics is a worldview in which white guys remain on top. That's what they are trying to preserve. That is the situation if they don't have any minimally informed opinions on the respective benefits/drawbacks of Republican and Democratic economic policies.