"They wanted the word of God out to every family," Barton says in the clip. "If these guys happen to be Christians it makes a lot of sense."
Barton then picks up a small rare Bible known as the "Aitken Bible." "The Bible of the Revolution was printed by the Congress of the United States. So Congress printed the first English Language version of the Bible," Barton said. He goes on to say the Congress said, "This was a neat edition of the Bible for use in our schools."
Warren Throckmorton, an associate professor of psychology at Grove City College, a private Christian school in Pennsylvania, has criticized Barton's version of history and Cameron's films.
About much of the history featured in the film, Throckmorton said, "That's just not what happened."
After seeing clips of the documentary, Throckmorton fact-checked some parts.
He said he found that the "Thompson Hot Press Bible" was not funded in total by 12 Founders. Instead, he said, the Bible was funded by a subscription base of 1,200 customers that included 12 Founding Fathers. "The printers funded that Bible, the Founders didn't fund it. It was a business venture for them."
As for the quote Barton attributed to Congress about putting the Bible in schools, it actually came from Robert Aitken's petition to Congress. Aitken was a colonial printer. The Journals of Congress from 1782 shows Aitken completed the Bible on his own and sought the blessing of Congress.
The record shows a report from two congressional chaplains who examined the work, which they praised.
Congress passed a resolution to recommend "this edition of the Bible to the inhabitants of the United States and hereby authorize him to publish this recommendation in the manner he shall think proper." That resolution did not mention it being put in schools.
"David Barton gets the facts wrong when it comes to these two Bibles," Throckmorton said. "The facts of the case are stretched and embellished to create a narrative that is misleading."
Cameron defended Barton's work. "No one is more guilty of cherry picking evidence than those who bow to the god of political correctness, especially historians," Cameron said. "Everyone is going to select the information that is important to their thesis. If you're bent on being politically correct, it's very easy to fall into that trap."
Throckmorton noted that he and other critics of Barton's work hail from Christian colleges and universities.
Early controversy surrounding Cameron's comments on social issues have given the film more media coverage than Cameron could have imagined for a small-budget documentary.
Appearing on CNN's Piers Morgan Tonight last month, Cameron fielded questions about abortion, gay marriage and what he would do if one of his six children came out to him as gay.
None of the topics appear in the film, but Cameron expressed views on same-sex marriage, abortion and homosexuality that are common among conservative evangelical Christians.
Cameron called homosexuality "unnatural," adding, "I think that it's detrimental, and ultimately destructive to so many of the foundations of civilization."
His comments sparked outrage from gay rights groups like GLAAD, the Gay and Lesbian Alliance Against Defamation. The group led a campaign to counter Cameron's comments with other 1980s TV stars and evangelicals on the other side of the theological spectrum.
GLAAD spotlighted a bevy of celebrities who chided Cameron for his positions on homosexuality, including a tweet from Rosanne Barr, who suggested Cameron was "an accomplice to murder with his hate speech."
Cameron said his support for traditional marriage is rooted in faith and thinks it should inform policy decisions: "You either believe marriage and human sexuality are sacred or you do not."
Cameron jokingly described his faith as "high octane" but said he considers himself part of the evangelical Christian tradition. He said he goes to a small nondenominational community church near his home in California, though his publicist later clarified that he is not a member of the church, whose name he would not disclose because of privacy and security concerns.
Cameron said he was caught off guard by the controversy around his comments.
"It is my goal to love everyone. I hate no one," he said. "Regardless of their race, religion, their proclivities, the desire of their heart and how they want to live their life and the decisions that they make. I can even respect people's decisions and lifestyle choices just as I hope they have the courtesy to respect my decisions and my choices."