All 16 of the prominent artists, authors, performers and architects on the President’s Committee on the Arts and the Humanities resigned on Friday, the latest group to protest Donald J. Trump’s defense of white nationalists after the violent demonstrations in Charlottesville, Va.

In a letter addressed to Mr. Trump, the committee members blasted his “hateful rhetoric,” and they apparently even encoded a message: The first letter of each paragraph and “thank you” spells out “resist.”

“Reproach and censure in the strongest possible terms are necessary following your support of the hate groups and terrorists who killed and injured fellow Americans in Charlottesville,” the letter says. “The false equivalencies you push cannot stand.”

The letter’s signatories include the artist Chuck Close, the author Jhumpa Lahiri, the architect Thom Mayne and the “Jersey Boys” actor John Lloyd Young. The Washington Post first reported that the committee members were resigning.