Writing for New Republic, Garret Keizer argues that nihilism, not racism or anger at elites, really drives Trump voters:
A nihilist is someone who dedicates himself to not giving a shit, who thinks all meanings are shit, and who yearns with all his heart for the “aesthetic pleasure” of seeing the shit hit the fan. Arguing with a nihilist is like intimidating a suicide bomber: The usual threats and enticement have no effect. I suspect that is part of the appeal for both: the facile transcendence of placing oneself beyond all powers of persuasion. A nihilist is above you and your persnickety arguments in the same way that Trump fancies himself above the law.
[I]t’s probably a mistake to view nihilism as “an explanation apart” from the common analyses of the Trump phenomenon. Economic dispossession and virulent racism stand in relation to nihilism not as alternative theories but as reciprocal causes and effects. In other words, all three flourish in a moral vacuum.
A sense of radical incredulity, spectacularly typified by Trump’s refusal to believe his own intelligence services, is but one manifestation of the nihilism that brought him to power. What makes him “the real deal” in the eyes of his most ardent admirers is largely his insistence that almost everything else is fake. Like him, they know that the news is fake, the melting ice caps are fake, the purported citizenship of certain voters is fake, science is fake, social justice is fake, the whole notion of truth is fake. Whatever isn’t fake is so relative that it might as well be fake; “true for you,” maybe, but that’s as far as it goes. Among those who call themselves “believers” and are thus at least technically not nihilists, one frequently finds an obsession with apocalypse, a gleeful anticipation of the living end that will destroy the inherent fakery of all things. The social teachings of the Gospels need not trouble the Christian conscience so long as the troubles predicted in Revelation come to pass.
Another pertinent factor is envy, a basic human emotion that rising social inequality can only exacerbate. To put it in cruder terms: “The world sucks for me, so I am going to make it suck for you too. I have lost my job, my status as a white male, and may even lose my gun. So you, my smug, privileged friend, are going to lose your civil liberties, your faith in social progress, your endangered species, your affirmative action, your reproductive freedom, your international alliances, your ‘wonderful’ exchange student from Syria.” The rationale is probably not too distant from that of the jealous husband who shoots his wife, her lover, and himself. Enjoying ourselves, are we? We will enjoy nothing!—which is to say, we will enjoy the only thing a nihilist can enjoy.
It's a slightly depressing essay, but probably accurate. Sigh.