The article is not that excellent. The author seems to be christian, thus, a lot of socialist religious ones where name droped in it, the article.

First, Marx himself was not a marxist, actually he hated them: >The bad about Marxism is the Marxist!< Second, one has not to be part of a group to have partition or to support one.
Oho, Libertarian arguements are just anarchist. The only power they believe in is the money they can accumulate. Actually libertarian ideology is anarcho-capitalism, which is capitalism without any states because everything is a corporation, which is just fascism as Mussolini stated once.
So what? It is irrelevant whether somebody thinks Marx is overrated and tell that the free market and free trade as the ideology libertarianism is should be the best ... O God! xD