I see Vox Day is up to his usual form. Writing for WorldNetDaily, he tries to dilute the impact of the Treaty of Tripoli by a bit of heavy-handed framing.
[T]he argument that America was never a Christian nation relies upon a common atheist trick, in this case, the substitution of the word “nation” for “government.” What is not, in any sense, founded on the Christian religion? Is it “the United States of America”? Is it “the American people”? No, it is “the Government of the United States of America.”
Notice it’s the atheists who are trying to “trick” you into confusing the American nation with the American government. No Christian (like David Barton, for instance) would ever try to conflate “nation” and “government” in such a way as to make it sound like our laws and government institutions (e.g. public schools) had a right and/or obligation to give preference to Christianity.