…does not mean what you think it means
Whenever I see someone talking along the lines of the individual that slacktivist is talking about here, the whole business about how the founding fathers intended the United States to be a Christian nation, and the squinting at and bending of the establishment and free exercise clauses of the First Amendment to try and justify that position, I like to point to the following three words: Treaty of Tripoli.
Because you see, there really isn’t more conclusive evidence of exactly what the founders were thinking than this: an official document, signed by President John Adams (For God’s sake, Sit Down!), who’s about as “Founding” a “Father” as you can point to, that contains the following sentence:
As the Government of the United States of America is not, in any sense, founded on the Christian religion…
Does it really get any clearer than that?