Walk By faith not by sight, the fact that you can even say that people live morally attests to the existence of immorality, erego sin. Furthermore not drinking, smoking, murder etc. Is not the Christian definition of morality, we seek perfection.
P.S. All men are guilty of adultery, as Jesus said " When you look upon a woman with lust you have already committed adultery in your heart."
A lot of Jefferson's statements seem to be reflecting on the nature of the political controls that the catholic church instituted along with James Madison, yes they were deists so Christian principles are interwoven into their ideas, sure they appear to vehemently hate the clergy and the institutions that they supported. John Adams also remarks on the creeds oaths etc. These are truly fabricated by the Catholic Church, but that does not mean they are all bad. The majority of these quotes would be correct in the context however if we were to think about Christianity as actually only having a very small following. Those who " Pick up their Cross daily" then this is hardly true. However I do agree that the clergy and the institutions were extremely corrupt but that is not really a reflection on Christianity it is more likely a reflection on human nature.
I've recently realized that including terms like douchebag probably doesn't help "Let no corrupting talk come out of your mouths, but only such as is good for building up, as fits the occasion, that it may give grace to those who hear" Ephesians 4:29. Well not realized rather chose to stop ignoring how bout that.
Instead of thinking literally think more in terms of thoughts and behavior. Sure you ought not actually say the lord's name in vain but the real purpose is to teach people to treat God with the awe he is due through their behavior and thoughts towards him. He is not a trivial casual being. I learned that from a guy named Max Lucado who learned it from a Jewish Rabbi. Seems to make sense.