Anyway, Ed Brayton brings us a more accurate look at what the views of the Founders really were from Evangelical historian Greg Frazer: theistic rationalism.
Theistic rationalism was a hybrid belief system mixing elements of natural religion, Protestant Christianity, and rationalism – with rationalism as the decisive factor whenever conflict arose between the elements. Theistic rationalists believed that these three elements would generally be in accord and lead to the same end, but that reason was determinative on those relatively rare occasions in which there was disagreement. Rationalism as used here is the philosophical view that regards reason as the chief source and test of knowledge. Educated in Enlightenment thought, theistic rationalists were at root rationalists, but their loosely Christian upbringing combined with reason to convince them that a creator God would not abandon his creation. Consequently, they rejected the absentee god of deism and embraced a theist God of, to a significant extent, their own construction. Hence the term theistic rationalism.Interesting.
An emphasis on reason had long been accepted in the Christian community, but in Christian thought, reason was a supplement to revelation, which was supreme. Theistic rationalism turned this on its head and made revelation a supplement to reason. In fact, for theistic rationalists, reason determined what should be accepted as revelation from God. Unlike deists, theistic rationalists accepted the notion of revelation from God; unlike Christians, they felt free to pick apart the Bible and to consider only the parts which they determined to be rational to be legitimate divine revelation. They similarly felt free to define God according to the dictates of their own reason and to reject Christian doctrines which did not seem to them to be rational.
The God of the theistic rationalists was a unitary, personal God whose controlling attribute was benevolence. Theistic rationalists believed that God was present and active in the world and in the lives of men. Consequently, they believed in the efficacy of prayer – that someone was listening and might intervene on their behalf. Theistic rationalism was not a devotional or inward-looking belief system; it was centered on public morality. God was served by living and promoting a good, moral life. The primary value of religion was the promotion of morality, and the morality generated by religion was indispensable to a free society. Since all of the religions with which they were familiar promoted morality, they held that virtually all religions were more or less equally valid and led to the same God who is called by many names. Theistic rationalists generally disdained doctrines or dogmas. They found them to be divisive, speculative, and ultimately unimportant since many roads lead to God.