As someone who has floated on the fringes of Libertarian ideology for the last 12 years of my life, the one and only thing I find all libertarians agree upon, both Leftist and Rightist, is the immediate necessity to end all wars with foreign peoples. In fact, the anarchist sectors of libertarianism would all be in agreement with the basic axiom that Apartheid is the separation of Humanity by states; and that the continued power of Statism in the age of global interconnectivity through the internet, represents an anachronism.
Yet we find it practically impossible for the Socialist and Liberal wings of Libertarianism to collude in a meaningful way towards the dissolution of states, the negation of war forever, and the effective end to the conflictive cycles of History. Why? For the Liberals it's all about making paper. The desire to make as much money as they possibly can within the capitalist framework. While for Socialists their primary issue with a Left/Liberal alliance is the racist history underlying American Libertarianism.
I think it's important for us to keep in mind that the racist elements of Right Libertarianism are all aging and dying off at a rapid rate, which is leaving more room for the non-racist Liberal Right to make more social headway. It's also important to keep in mind that there's little to nothing which prevents workers from forming cooperative enterprises in the stateless Solid State Society, so the particulars of which regions or firms are capitalist or socialist become immaterial in the big picture. That big picture being: our immediate priority is to unify humanity and achieve eternal peace between Man.
Therefore it's our imperative to bury the hatchet, at least temporarily, on mere economic matters so that we can achieve Peace in Our Time.