Jefferson was not an atheist.
"I can never join Calvin in addressing his god. He was indeed an Atheist, which I can never be; or rather his religion was Daemonism. If ever man worshipped a false god, he did.
-Thomas Jefferson, letter to John Adams, April 11, 1823
Neither was Franklin.
"Some books against Deism fell into my hands. ... They wrought an effect on me quite contrary to what was intended by them; for the arguments of the Deists, which were quoted to be refuted, appeared to me much stronger than the refutations; in short, I became a thorough Deist."
http://www.ronaldbrucemeyer.com/rants/0117almanac.htm
"I can never join Calvin in addressing his god. He was indeed an Atheist, which I can never be; or rather his religion was Daemonism. If ever man worshipped a false god, he did.
-Thomas Jefferson, letter to John Adams, April 11, 1823
Neither was Franklin.
"Some books against Deism fell into my hands. ... They wrought an effect on me quite contrary to what was intended by them; for the arguments of the Deists, which were quoted to be refuted, appeared to me much stronger than the refutations; in short, I became a thorough Deist."
http://www.ronaldbrucemeyer.com/rants/0117almanac.htm
Quote from james_bond_3rd:
Not all founding fathers were christians. Thomas Jefferson was a well-known atheist. So was Ben Franklin. These were the two high-profile, well-known ones. If we researched more, we'd find quite a few others whose "Christian" belief was at best suspect.
This nation was not founded on Christianity, as some evangelicals want you to believe.