I'm well aware of all of the above. Even so, a disproportionately large number of librtarians are also atheists. It's partly due to the historic roots of the recent (past 30 years) libertarian movement, which was led or influenced by secular/atheistic Jews (e.g., Murray Rothbard, and the Objectivist influence of Rand, the Brandons, Piekoff), and less so by secular/atheistic Catholics (Jerome Tuccille). Karl Hess (a Protestant?) was also not much into religion.
Of course there are "Bible-believing Christian" libertarians, but they are relatively latecomers to modern libertarianism.
Our Founding Fathers were libertarian, and I don't think anyone would ever accuse them of being atheists.
Oh, you'd find disagreement on both scores. Not everyone would call them libertarians, and many of them were deists, which some contend was a cover for atheists. I've also heard Ben Franklin, Thomas Jefferson, and Tom Paine accused of atheism, although I'm not sure how accurately.
exodus - Our Founding Fathers were libertarian, and I don't think anyone would ever accuse them of being atheists.
All I've read about deists says that even if they weren't mainstream Christians, they certainly weren't atheists. They believed in God.
Ben Franklin called himself a Christian, but he noted that he had serious problems accepting that Jesus and God were the same person. I share his skepticism on that point, but I am a Christian just the same.
My requirement for the title "libertarian" is a belief in the Rights of Men, and in the Rule of Law. Our Founders qualify.