The nonprofit Americans United for Separation of Church and State is calling out one of the oldest public charter schools in Arizona for using two books from crank and Glenn Beck favorite Cleon Skousen that promote racism and a Christian nationalist interpretation of American history, reports the Arizona Republic.

The school, Heritage Academy, is apparently using two of Skousen’s most popular books, “The 5,000 Year Leap” and “The Making of America,” in an attempt to educate its student body of the ways in which America was actually founded by hardcore Jerry Falwell-style Christian conservatives...

According to legal scholar Garret Epps,  “parts of [Skousen's] major textbook … present a systematically racist view of the Civil War” with a “long description of slavery in the book” arguing that slavery was “beneficial to African-Americans and that Southern racism was caused by the ‘intrusion’ of Northern abolitionists and advocates of equality for the freed slaves.”