Brain Tubbs often disagrees with my portrayal of the Founders in the way that I stress the key Founders who happened to be freethinking theistic (unitarian) rationalists.
I would say that, for the other side, he has a good blog -- one that points out facts that perhaps go unstressed by me -- except that he has a permalink to Wallbuilders. And that I think destroys any credibility that he might hope to achieve.
My list of scholars associated with the more social conservative side on church/state issues, whom I greatly respect (though I have some serious disagreements with some of them) include James H. Hutson, Philip Hamburger, Daniel Dreisbach, and Vincent Phillip Munoz.
David Barton, William Federer, D. James Kennedy, and Tim Lahaye (yes, Lahaye, a number of years ago, wrote a book on the Founders and Religion that is as bad as anything Barton has put out) are ahistorical hacks who offer quotations either badly taken out of context so as to be grossly misleading, or sometimes downright fraudulent.
Even Hutson recognizes this. Indeed, in the preface to his fine book of quotations he mentions as the prime motivation in writing this work that previous quote books offered by religious conservative "scholars" (I put that word in quotations because none of them, it seems, are trained historians) have been so shoddy. His words:
Few compilers of the religious quote books are academic historians....The[ir] contempt for professional historians seems, unfortunately, to have fostered a corresponding contempt for the craft of history, for some of the compilers display a cavalier attitude toward factual accuracy and the use of evidence which comprises the integrity of their work....Convinced that the subject, Religion and the Founding, deserves better treatment than it has received in the religious quote book genre, I offer a quote book that is as objective as possible and that conforms to the canons of historical scholarship.
It is a great, and very useful book.