No, they really did believe in the complete separation between state and religion. This is why they put up the firewall between the two. Religion is purely a personal belief system. Different people belief in different things and there is no way to objectively “fact check” to determine that one particular religion is a correct description of reality and all others wrong (this is called scientific method). Hence, Heinlein’s comment (as Lazarus Long) that “one man’s theology is another man’s bellylaugh”. As such, the founding fathers realized that religion is purely subjective in nature and, therefor, could not be defined as a single standard for all humans. This is the reason and purpose for the firewall between state and religion. The state has to serve as a single standard for all the people in the country. Any particular religion, by definition, cannot serve this function.
same thing applies to the term “sin”. Sin consists of causing intentional harm to others. Any other definition of “sin” is invented non-sense.
One man’s supernatural is another man’s engineering. The term “supernatural” is a null one.
