Preston Damsky is a law student at the University of Florida. He is also a white nationalist and antisemite. Last fall, he took a seminar taught by a federal judge on “originalism,” the legal theory favored by many conservatives that seeks to interpret the Constitution based on its meaning when it was adopted.

In his capstone paper for the class, Mr. Damsky argued that the framers had intended for the phrase “We the People,” in the Constitution’s preamble, to refer exclusively to white people. From there, he argued for the removal of voting rights protections for nonwhites, and for the issuance of shoot-to-kill orders against “criminal infiltrators at the border.”

Turning over the country to “a nonwhite majority,” Mr. Damsky wrote, would constitute a “terrible crime.” White people, he warned, “cannot be expected to meekly swallow this demographic assault on their sovereignty.”

At the end of the semester, Mr. Damsky, 29, was given the “book award,” which designated him as the best student in the class. According to the syllabus, the capstone counted the most toward final grades.

The Trump-nominated judge who taught the class, John L. Badalamenti, declined to comment for this article, and does not appear to have publicly discussed why he chose Mr. Damsky for the award.

That left some students and faculty members at the law school, considered Florida’s most prestigious, to wonder, and to worry: What merit could the judge have seen in it?