Aside from the “war of the quotes,” the religious traditions of the peoples of the States who ratified the Constitution is what’s crucial- and this was decidedly Christian.
My stand as well. You may find these interesting,
http://www.conservapedia.com/Separation_of_church_and_state
http://peacebyjesus.witnesstoday.org/CauseEffect.html
http://www.conservapedia.com/Moral_decline