William Kristol was a leading figure in the conservative movement. His father Irving Kristol was renowned as the godfather of neoconservatism. Bill was the editor of the Weekly Standard for many years. But because he is a principled conservative, he loathes what Trump is doing to our nation. He writes at The Bulwark, my favorite Never-Trump blog.

What’s happening is not normal, he writes:

If the Trump administration’s sudden assault on thousands of foreign students legally studying at Harvard seems unprecedented, it’s because it is. If the abrupt abrogation of temporary protected status for hundreds of thousands of Venezuelans legally living and working in the United States seems unprecedented, it’s because it is. If the sudden arrests and deportations of law-abiding immigrants checking in as ordered at government offices seems unprecedented, it’s because it is. If the deportations of other immigrants without anything like due process and basically in defiance of court orders to prisons in third countries seems unprecedented, it’s because it is.

And if it all seems utterly stupid and terribly cruel and amazingly damaging to this country, it’s because it is.

But it turns out nativism is one hell of a drug. The Trump administration has ingested it in a big way, and it’s driving its dealers and users in the administration into a fanatical frenzy of destructive activity. And the Republican party and much of Conservatism Inc.—and too much of the country as a whole—is just watching it happen.

The United States has many problems. No one seriously thinks that Harvard’s certification to participate in the Student and Exchange Visitor Program is one of them. And the Department of Homeland Security’s announcement of the action against Harvard makes clear this isn’t just about Harvard: “Let this serve as a warning to all universities and academic institutions across the country.” Are our other institutions of higher education suffering from their ability to attract and enroll students from abroad, if they chose to do so? Are the rest of us?

No. And to the degree there are some discrete problems, nothing justifies this kind of action against Harvard. As Andrea Flores, a former DHS official, told the New York Times, “D.H.S. has never tried to reshape the student body of a university by revoking access to its vetting systems, and it is unique to target one institution over hundreds that it certifies every year.”

Similarly, what’s the justification for the Trump administration’s unprecedented sudden and early abrogation of temporary protected status for 350,000 Venezuelans who fled tyranny and are now living peacefully and working productively in this country? There is no broad unhappiness at their presence, no serious case that they are causing more harm than doing good. Nor for that matter is there a real argument that the presence of 20,000 Haitians living and working in Springfield, Ohio, is a problem that required first lies to denigrate them and now attempts to deport them.

And this week, the nominee to head U.S. Citizenship and Immigration Services said the Trump administration intends to end the well-established Optional Practical Training Program, which is the single largest channel for highly skilled immigrants to stay and work in the United States after finishing their education here. A study by a leading immigration scholar, Michael Clemens of George Mason University, finds that slashing that program would cause permanent losses to U.S. innovation, productivity, economic growth, and even job opportunities for native workers.

But here we are, with an administration where fantasy trumps reality, ideology trumps evidence, and demagoguery trumps decency. As the economist Dani Rodrik puts it, “Three things made the US a rich and powerful nation: the rule of law, its science & innovation system, and openness to foreign talent. Remarkable how Trump has taken a sledgehammer to all three. No enemy of this country could do more.”

Foreigners studying and working here are not damaging the United States. A virulently nativist administration is what’s damaging the United States. It’s doing so in ways from which it will be difficult to recover. Just as important, it’s doing so in ways that will be a permanent stain on this nation’s history.