I just have to say in all candor that since this nation was founded primarily on Christian principles... I would probably have to say yes, that the Constitution established the United States of America as a Christian nationWhy is he in an idiot? Because the US was founded on the values of the enlightenment, not the values of Christianity. This is why the United States has no pope, no slaves, and no faith tests for those who might wish to hold public office. Indeed, not many of the biblical, or canon laws have any sway here. Additionally, you may have noticed that Christianity doesn't run on principles like democracy, tolerance, or the separation of power.
Also, he is an idiot, because the U.S. Constitution contains no mention of "God" or "Christianity."
And finally he is an idiot, because, in 1797, during the lifetime of the founders, America made a treaty with Tripoli, declaring that "the government of the United States is not, in any sense, founded on the Christian religion." This was written during Washington's presidency, and approved by the Senate under John Adams.
Tell your friends.