Fox News contributor and former history teacher Leo Terrell said on Tuesday that the American Federation of Teachers president “lied” about the “importance of critical race theory” and that the American Revolution was the-new-york-times” target=”_blank”>predicated<,” adding he was “very upset” by AFT President Randi Weingarten’s comments.

“It’s very insulting because what’s at issue here is not only the credibility of American history, but lying to our school children about American history. This is what’s so frightening about this critical race theory,” Terrell said.

MARTHA MACCALLUM SPARS WITH TEACHERS UNION PRESIDENT OVER CRITICAL RACE THEORY IN CLASSROOMS: ‘THAT’S A DODGE’

Terrell’s comments came after Weingarten defended the 1619 project in an interview Monday with Martha MacCallum on “The Story.”

The Story” host Martha MacCallum tangled with American Federation of Teachers president Randi Weingarten Monday over her support of the-new-york-times” target=”_blank”>The New York Times<

Terrell, a civil rights attorney, said that during his tenure as a teacher, he did not “lie” to his students about the American Revolution. Terrell said the teachings of critical race theory imply that teachers have been lying to children for decades.

“In the American Revolution, we fought against the British for our independence, not to preserve slavery. That is a lie, and yes, that union president is afraid. I hope she is listening. She is afraid to tell the truth because no one believes that the American Revolution was fought to preserve slavery.”

Fox News’ Yael Halon contributed to this report.