I thought the Search for Christian America was a great book. As Dr. Rowe noted and as the book's authors explain in the Afterword, "this book was originally prepared early in the Reagan era when for many evangelicals, hopes were high for restoring America's Christian heritage." (p. 156)
But those hopes (or delusions)were not realized, and the author's noted that, "starting with Christian principles is no guarantee of achieving Christian political results. Or, to put it in terms that theistic founders of this nation understood well, 'power corrupts'."
Historians like Mark Noll or John Fea are such faithful historians in the sense that, as stated by Noll et. al. in reference to the "Christian nation" thesis they were rebutting, "we hope to correct the mistaken assumption that the American past offers an adequate Christian blueprint for our lives today. We must agree with Roger Williams that no nation since the coming of Christ has been uniquely God's chosen people" (pp. 24-25)
Update: I have JD, MBA, and LL.M. degrees (all from Temple University). Technically the "JD" is a doctorate; though there is great debate whether it's appropriate for JDs to be termed "Dr." I generally don't go by "Dr.," but folks are free to call me that if they'd like. I do thank JMS for the respect though!