The phrase that most bothers is "reason trumps revelation" -- what Dr. Frazer's thesis claims America was founded on by virtue of its political theology. As it were, America's key Founders, unlike the strict deists, may have believed, in principle, in God revealing to man. But all such revelations were subject to the metaphorical if not literal razor (in Jefferson's case) of "reason" to decide which revelations were true. Thus, the "Bible" as a canon, was "fit" to be "edited" according to this standard.
Well, a few, if not key but profoundly "notable" Founders held to a different sort of radical tendency, one given to us by the Quakers: a radicalism of the spirit.
Examine, if you will, An Apology for the True Christian Divinity by Robert Barclay first published in 1678. This work does not, as per the Enlightenment spirit of the age, set up man's individual reason to "test" the Bible for truth and error (with reason, of course, being the final arbiter). Rather it sets up the individual believer's sense of "Spirit" within him or her as the final arbiter of truth.
From Barclay's THE THIRD PROPOSITION, Concerning the Scriptures:
Nevertheless, because [the Scriptures] are only a declaration of the fountain, and not the fountain itself, therefore they are not to be esteemed the principal ground of all Truth and knowledge, nor yet the adequate primary rule of faith and manners. Yet because they give a true and faithful testimony of the first foundation, they are and may be esteemed a secondary rule, subordinate to the Spirit, from which they have all their excellency and certainty: for as by the inward testimony of the Spirit we do alone truly know them, so they testify, that the Spirit is that Guide by which the saints are led into all Truth; therefore, according to the Scriptures, the Spirit is the first and principal leader.a Seeing then that we do therefore receive and believe the Scriptures because they proceeded from the Spirit, for the very same reason is the Spirit more originally and principally the rule, according to that received maxim in the schools, Propter quod unumquodque est tale, illud ipsum est magis tale: That for which a thing is such, that thing itself is more such.