The Founders were confident that God was "on our side," while constantly invoking his protection, guidance and wisdom.
I'd ask this smart-@ss Tom Krattenmaker whether it "backfired" on them as well?
Here's Krattenmaker's original article:
http://www.usatoday.com/news/opinion/editorials/2006-01-29-god-card_x.htm
I couldn't find contact information...but certainly, I think you raise a good question, perhaps one that Krattenmaker has an answer for, or maybe not...