One thing I do notice about some libertarians: the theory is always uppermost. On subjects like immigration libertarians sometimes act like the last supporters of the theory of the Ptolemaic theory of the universe, with planets and stars moving in circles around the earth. The math doesn't add up, so they add ever more circles, circles within circles with in circles in the hope that it will come out right, rather than scrap some of their theoretical assumptions.
The good thing, though, is that some times an open and honest airing of differences can have a positive effect. The hard core in both camps won't be swayed, but some of us in between will take both sides into account and maybe make a better judgment.
The reason for the falling out between conservatives and libertarians that we see at Free Republic is that, at least in the sphere of ideas, socialism has lost and markets have won. Given such a situation, it was inevitable that the two camps would turn on each other over which really had the very best answer.
If the idea of increased state power really is coming back, some conservatives and some libertarians will find that they have more in common with each other than with the other side. But then some may find themselves on "the other side" if we are too enticed by the new government programs.
The terms of the conflict won't be over whether markets alone are sufficient, though, but once again over whether the state is too large and intrusive. So we'll find out that we were friends all along (bitter debates over drugs will continue, though).
Fleming's overlong treatises always give me the mental picture of a man carefully reading and analyzing several long works on economics, political theory and history, then deciding to write about what he has absorbed and stopping to huff some airplane glue before sitting down at the keyboard.