From a review of "Getting Jefferson Right: Fact Checking Claims About Our Third President" by evangelical Christian historians Warren Throckmorton and Michael Coulter, who shredded Barton's work:

"In each of these categories, as Throckmorton and Coulter gently put it, “we find the reality is often much different than the claim.” That’s their way of saying that the claims are, mostly, “pants on fire,” to use the language of Politifact, the Tampa Bay Times’ fact-checking project. Others rate a “false” or “mostly false” label, while there isn’t a single one (other than minor statements of fact, such as date of birth or dates of his presidency) that rates “true,” or even “mostly true.”"

http://religiondispatches.org/the-quixotic-task-of-debunking-david-barton/