Well, the thesis is certainly cynical, but like Wittgenstein, I intend to push it as far as it can go until it slams against a wall it can't knock down. So far, I've encountered no such wall.

Libertarians are classic liberals who haven't learned the socialist lessons about the unintended consequences of liberal progress. They're purists who stick by the early-modern reasoning even though it's been outdated for many decades. Thus, libertarians tend to be cultists in their thinking. They're so-called economic but not social "conservatives," which means only that they approve of animalistic dominance hierarchies in the market, but not in the home. So much for their principles.

They're supposed to be secularists, too, rather than religious fundamentalists. But consistent secularism (atheistic, humanistic skepticism) takes you straight to the socialist checks on classic liberalism (given how, in practice, capitalism corrupts the whole democratic society, etc).