Here I would dissent, mildly, from the desire to tell a mostly ideological story in the aftermath of El Paso, and declare war on “white nationalism” — a war the left wants because it has decided that all conservatism can be reduced to white supremacy, and the right wants as a way of rebutting and rejecting that reductionism.

By all means disable 8Chan and give the F.B.I. new marching orders; by all means condemn racism more vigorously than this compromised president can do. But recognize we’re dealing with a pattern of mass shootings, encompassing both the weekend’s horrors, where the personal commonalities between the shooters are clearly more important than the political ones. Which suggests that the white nationalism of internet failsons is like the allegiance to an imaginary caliphate that motivated the terrorists whose depredations helped get Trump elected in the first place. It’s often just a carapace, a flag of convenience, a performance for the vast TV-and-online audience that now attends these grisly spectacles, with a malignant narcissism and nihilism underneath.

And this is what really links Trump to all these empty male killers, white nationalists and pornogrind singers alike. Like them he is a creature of our late-modern anti-culture, our internet-accelerated dissolution of normal human bonds. Like them he plainly believes in nothing but his ego, his vanity, his sense of spite and grievance, and the self he sees reflected in the mirror of television, mass media, online.

Because he is rich and famous and powerful, he can get that attention with a tweet about his enemies, and then experience the rush of a cable-news segment about him. He doesn’t need to plot some great crime to lead the news; he just has to run for president. But having him as president — having him as a political exemplar for his party, and a cultural exemplar of manhood for his supporters and opponents both — is a constant ratification of the idea that we exist as celebrities or influencers or we don’t exist at all, and that our common life is essentially a form of reality television where it doesn’t matter if you’re the heel or hero so long as you’re the star.

One recurring question taken up in this column is whether something good might come out of the Trump era. I keep returning to this issue because unlike many conservatives who opposed him in 2016, I actually agree with, or am sympathetic toward, versions of ideas that Trump has championed — the idea of a more populist and worker-friendly conservative economics, the idea of a foreign policy with a more realpolitik and anti-interventionist spirit, the idea that decelerating low-skilled immigration would benefit the common good, the idea that our meritocratic, faux-cosmopolitan elite has badly misgoverned the republic.