I agree that the founding fathers didnt mold us to be a christian nation fundamentally through government, but this mistakenly leads many to claim that we don't have a christian culture here. In the bible belt, Appalachia and seemingly throughout the midwest and small towns of most every state we undoubedly still have a very puritanical culture and work ethic, even in most blue states as far as I can tell. My own state's culture is so religious that by law I can't run for office as an atheist.

Obviously not by design, but damn our culture surenuff is still pretending to be way too christian for comfort.

The Treaty of Tripoli 1796: [usconstitution.net]