Three parents filed a lawsuit accusing the California state school curriculum of violating the U.S. Constitution over an Ethnic Studies lesson that asks kids to pray and chant to Aztec gods.

TheBlaze reported: “Our clients are not opposed to having students learn about different cultures and religions, including the practices of the Aztecs,” said Paul Jonna, special counsel at Thomas More Society, which is representing the parents in court.

“But the California State Board of Education’s approved Ethnic Studies Model Curriculum goes far beyond that by directing students to pray to Aztec deities,” he explained. “This portion of the Ethnic Studies Model Curriculum is not only offensive but blatantly unconstitutional.”

According to FOX 11, The issue emerged earlier this year when researcher Chris Rufo reported on that particular aspect of the state’s ethnic studies curriculum. As Fox News previously noted, the curriculum suggests chants that invoke the deity Tezkatlipoka.

Tezkatlipoka is an Aztec god that was honored with human sacrifices. According to the World History Encyclopedia, an impersonator of Tezkatlipoka would be sacrificed with his heart removed to honor the deity. In Aztec mythology, Tezkatlipoka is the brother of Quetzalcoatl, Huitzilopochtli, and Xipe Totec – all of whom appear to be invoked in the chant.

The Thomas More Society, which represents the parents, described the model curriculum as “blatantly unconstitutional.” “Our clients are not opposed to having students learn about different cultures and religions, including the practices of the Aztecs,” said Paul Jonna, partner at LiMandri & Jonna LLP and Thomas More Society special counsel.

“But the California State Board of Education’s approved Ethnic Studies Model Curriculum goes far beyond that by directing students to pray to Aztec deities. This portion of the Ethnic Studies Model Curriculum is not only offensive but blatantly unconstitutional.”