The author starts by claiming, as I pointed out, through an amazing series of rhetorical flourishes that because people are property this means that Adam Smith is fallacious. A total abuse of logic.
He finishes off by claiming that Hayek's The Fatal Conceit is somehow a repudiation of libertarianism provoked by his divorce. What nonsense.
In between, as AJ points out, he confuses Mises' theory of Subjective Value (worth) with the idea that values (ethics) are subjective. He then wonders why Mises' did not believe in Situational Ethics! There is no one more ethically consistent than libertarians, yet Fleming accuses them of being relativists. Is he really this stupid?
If you wish to defend this piece of crapola, you need to address the points that AJ and I brought up in our #3 and #4.
You may dispute Mises' and Hayek's contention that liberty and the marketplace support family and community while the state destroys them. Even if you are right, that has nothing to do with the points AJ and I brought up. And, BTW, it has been tried out. Throughout history.
I am not an economist and am not qualified to judge as regards Menger, Mises or the subjective theory of value, but I do think that Fleming is on to something regarding contemporary libertarians and their attitudes towards morality, though he doesn't do all that much better than I could at expressing it. You and #3 may very well have a point that a subjective theory of value (worth) is not a subjective theory of values (ethics). But what then is Mises theory of ethics or his attitude towards it? There is no reason why Mises should have such a theory since he works in a different field. But if he is taken to be so very important and essential a thinker by many, would the absence of such ethical views and the glorification of Mises have a harmful effect on the ethical views of his votaries? There does seem to be a gap between the suspension of judgement over value and the assertion of values that can and should be addressed by those who know more about it. Fleming addresses his doubts in a polemical anti-libertarian fashion, but he does express concerns that can and should be handled in a less confrontational fashion.
While I can't judge post #3 or the beginning of your post #4, the end is pure emotional rhetoric of the sort that one accepts or rejects more on faith than on anything else. There's nothing wrong with that, and it was very well written, but it's worth pointing out to those who find it convincing, that it's assertion rather than anything definitively proven or even supported by your earlier argument. There's nothing wrong with being a convincing writer -- and you seem better at it than Fleming -- but your reply #4 contains enough "rhetorical flourishes" of its own, impressive to those who already agree, but not convincing to those who don't.