There was also Thomas Jefferson and John Adams (many of the more prominent Founding Fathers were Unitarians and Deists). Given the caveat that your statement was a generalization it's certainly valid.
"Without morals a republic cannot subsist any length of time; they therefore who are decrying the Christian religion, whose morality is so sublime and pure (and) which insures to the good eternal happiness, are undermining the solid foundation of morals, the best security for the duration of free governments."
It is important to note that at the time of the signing of the Declaration of Independence Catholics could not hold office, exercise the franchise, educate their children in their faith, or worship in public in the colonies by edict of the Protestant Parliament and assemblies. I get a sense that many on FR would love to return to that state.
Thomas Jefferson and John Adams
These men did neither disdain nor disrespect Christians.