Folks, this is insane. It’s a measure of how deluded public discourse has become, how untethered from reality, that a mob of gunmen can terrify campers apparently because of the color of their skin — and think themselves heroes who are defending their communities.

All this ugliness may also be a window into the unrest that could unfold this winter if Trump is defeated but claims that the election was stolen from him by immigrants who voted illegally.

I’ve occasionally encountered mass hysteria in other countries. In rural Indonesia, I once reported on a mob that was beheading people believed to be sorcerers, then carrying their heads on pikes. But I never imagined that the United States could plunge into such delirium.

Antifa, short for anti-fascists, hasn’t killed anyone and appears to have been only a marginal presence in Black Lives Matter protests. None of those arrested on serious federal charges related to the unrest have been linked to antifa.