Throckmorton on Barton's Use of Adams' "General Principles of Christianity" Quote

See Warren Throckmorton's remarks here. This was in a letter from John Adams to Thomas Jefferson in 1813. This was John Adams at his most heterodox. Out of context, the quotation sounds like something that supports the Christian Nation thesis. Understood in context, however, Adams doesn't refer to what Barton et al. understand as "biblical Christianity," but rather some other very heterodox theological system, what Gregg Frazer has termed "theistic rationalism." It's a system that unites the "orthodox" with Universalists, Unitarians (Arians, Socinians, Priestleyans) and even "Deists and Atheists, and Protestants 'qui ne croyent rien.'" (That means "Protestants who believe in nothing.")