MSNBC contributor Eddie Glaude, Jr., rolled his eyes at critical race theory foe Christopher Rufo during a debate Tuesday as he expressed concerns over kindergartners being exposed to a book that attacks “whiteness.”

In response to Glaude’s claim that he was narrowly focused on bashing critical race theory as part of a broader effort to make it and other left-wing ideas unpopular, Rufo told MSNBC’s “Morning Joe” he cared “deeply” about the substance of what’s being taught in the nation’s schools.

“I’ve written policy papers, white papers, I’m deeply concerned about the substance,” Rufo said. “What I’m concerned about and what millions of parents are really concerned about is things that are happening in hundreds of public schools in Illinois and Chicago where they’re teaching children as young as kindergarten that whiteness is the devil and attempts to lure people into it with the promise of stolen land and stolen riches. That’s a book being used in hundreds of schools, and people don’t think that’s right.”

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As Rufo spoke, the liberal Princeton professor rolled his eyes in annoyance. 

After a clip of the exchange was posted to Twitter, Rufo linked to articles to back his claim. He was referring to a picture book called “Not My Idea: A Book About Whiteness,” which HuffPost recommends as one of the top “anti-racist books for kids and teens.” It’s the subject of a federal lawsuit by one Illinois middle-school teacher who says it teaches White children to “hate themselves.”

Rufo, a scholar at the Manhattan Institute, and Glaude had a far more peaceful exchange than in Rufo’s last appearance on MSNBC. Last month, he was a guest on far-left host Joy Reid’s program, where the anchor was panned by critics for repeatedly interrupting and condescendingly calling him “dear.”

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Rufo ripped Reid in a New York Post op-ed Monday after the National Education Association, the country’s largest teachers union, endorsed teaching CRT in the nation’s schools.

“The NEA’s militant stance on critical race theory provides much-needed clarity on the issue. Progressives such as MSNBC host Joy Reid can no longer disingenuously claim that critical race theory is only taught in law schools or that it is only a ‘lens’ for examining American history,” he wrote.

Rufo said Tuesday that one of the biggest misconceptions of critical race theory in the media is the notion that preventing its teaching would also prevent teaching about past American sins like slavery and Jim Crow.

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“You can teach about slavery, discrimination, and racism without using critical race theory. Critical race theory, in simple terms, is an academic discipline that holds that the United States was founded on racism, white supremacy and patriarchy and that those forces are still at the root of our society today,” he said. ” It’s a radical philosophy that’s rooted in Marxism and is frankly inappropriate as a pedagogical framework for teaching children.”

Host Joe Scarborough relayed to Glaude that liberal media members and “huge contributors to the Democratic Party” had relayed to him that they were concerned about elite private schools teaching youngsters to define themselves by race. 

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“We’re going to make mistakes. There are going to be extremes, there are going to be moments of overreach, I grant that. But part of what we have to do in this moment, Joe, and we’ve talked about this, is to confront the ugliness of who we are,” Glaude said.