[ansel12]

Of course they were almost all Protestant Christians, I think that 2 or 3 were Catholic Christians.

I’m not aware of any of them that denied Christ, or that were atheists.

[Clemenza]

Jefferson was far from being a Christian in the sense that you and I understand it. There was one Catholic signer of the Declaration (Charles Carroll) who was there largely because he represented a rather prominent Maryland family. If you read the writings of Adams and Jefferson, you will find that they were not fans of, what Jefferson referred to as "Priestly-ridden people."

Deists, un-Churched, Congregationalist, Episcopalian, or Quaker, few of the founders had anything in common with the fundamentalist charismatic faith so common in the megachurches today, and had nothing in common (philosophically or religiously) with the Church of Rome. Anything to the contrary is ahistorical revisionism at its worst. For a true lesson on fundamentalist protestant revivalism, see the Second Great Awakening to get a better clue as to why we are where we are today religiously in the US, and how the Bible Belt became the Bible Belt.