‘So wrong in so many ways” is how Gordon Wood, the Pulitzer Prize-winning historian of the American Revolution, characterized the New York Times ’s “1619 Project.” James McPherson, dean of Civil War historians and another Pulitzer winner, said the Times presented an “unbalanced, one-sided account” that “left most of the history out.” Even more surprising than the criticism from these generally liberal historians was where the interviews appeared: on the World Socialist Web Site, run by the Trotskyist Socialist Equality Party.

The “1619 Project” was launched in August with a 100-page spread in the Times’s Sunday magazine. It intends to “reframe the country’s history” by crossing out 1776 as America’s founding date and substituting 1619, the year 20 or so African slaves were brought to Jamestown, Va. The project has been celebrated up and down the liberal establishment, praised by Sen. Kamala Harris and Mayor Pete Buttigieg.

A September essay for the World Socialist Web Site called the project a “racialist falsification” of history. That didn’t get much attention, but in November the interviews with the historians went viral. “I wish my books would have this kind of reaction,” Mr. Wood says in an email. “It still strikes me as amazing why the NY Times would put its authority behind a project that has such weak scholarly support.” He adds that fellow historians have privately expressed their agreement. Mr. McPherson coolly describes the project’s “implicit position that there have never been any good white people, thereby ignoring white radicals and even liberals who have supported racial equality.”

The project’s creator, Nikole Hannah-Jones, is proud that it “decenters whiteness” and disdains its critics as “old, white male historians.” She tweeted of Mr. McPherson: “Who considers him preeminent? I don’t.” Her own qualifications are an undergraduate degree in history and African-American studies and a master’s in journalism. She says the project goes beyond Mr. McPherson’s expertise, the Civil War. “For the most part,” she writes in its lead essay, “black Americans fought back alone” against racism. No wonder she’d rather not talk about the Civil War.

To the Trotskyists, Ms. Hannah-Jones writes: “You all have truly revealed yourselves for the anti-black folks you really are.” She calls them “white men claiming to be socialists.” Perhaps they’re guilty of being white men, but they’re definitely socialists. Their faction, called the Workers League until 1995, was “one of the most strident and rigid Marxist groups in America” during the Cold War, says Harvey Klehr, a leading historian of American communism.