The Austrian School of Economics (that's what folks associated with Lew Rockwell and the Von Mises Institute espouse) uses a form of deductive logic that eschews empirical research and the scientific method. They also tend not to look at lessons from history, nor do they hold much admiration for conventional wisdom or tradition. As I have said before, we (as generally conservative in ideology) can agree with much of what strict libertarians have to say in regard to the limited role of government. However, in their zeal for a smaller government, libertarians (and especially those from the Austrian School) have turned their distaste for the bureaucratic largess into a hatred of America itself that rivals strident liberals.
Greenhut somewhat alludes to the common ground shared between libertarians and conservatives when he relates his editors opinion that everyone is 25% libertarian (while he goes on to make a different point with that opinion).
I have made these comparisons of libertarians and liberals before:
A blind adherence to Reason is very nearly as detrimental to mankind as the dream of a Utopian society. To paraphrase Burke, Reason may be nothing more than a cover for the preferences of an individual. A dose of history, a bit of tradition, and wisdom of generations past may assist in lessen the impact of unintended consequences stemming from naked Reason. The idea that Reason alone is somehow the best guide down the path to an ideal society is farcical (we also know an ideal society is farcical). In much the manner that statistics can be bent towards whatever end you seek, Reason may also be bent and colored with one's own preconceived notions.