Correct. The Founding Fathers had a lot of good ideas, but morality being dependent on religion wasn't one of them.
Interesting. Their predictions on this matter certainly appear to be proving true. What prediction or analysis might you offer to counter or sway the conclusion at this late phase of their experiment? We are still living and observing the results, so don't make stuff up.
Would you claim that the quality of morality as legislated by the state is more or less effective than the morality the colonials claimed was necessary for a people to maintain their freedom?