Barton's official biography describes him as "an expert in historical and constitutional issues". Barton holds no formal credentials in history or law, and scholars dispute the accuracy and integrity of his assertions about history, accusing him of practicing misleading historical revisionism, "pseudoscholarship" and spreading "outright falsehoods". According to the New York Times, "Many professional historians dismiss Mr. Barton, whose academic degree is in Christian Education from Oral Roberts University, as a biased amateur who cherry-picks quotes from history and the Bible." Barton's 2012 book The Jefferson Lies was voted "the least credible history book in print" by the users of the History News Network website. The book's publisher, Christian publishing house Thomas Nelson, disavowed the book and withdrew it from sale. A senior executive said that Thomas Nelson could not stand by the book because "basic truths just were not there."David Barton (author) - Wikipedia
John Garand, inventor of the M1 Garand rifle studied college via self study with a correspondence school called ICS
Walter P. Chrysler went to the same home study school John Garand did.
BTW, what historians and / or biblical scholars agreed with Barton?