First of all, if you think of Nazism and Fascism as 'excessively lawful', then you are seriously confused. The Nazis may have been militaristic, but they had nothing but contempt for democracy and the law. Hans Frank attempted to develop a legal system for the Nazi Reich, but found that Hitler, (like all leftists) enjoyed the protections of the law before his rise to power, but completely disregarded it afterwards. Furthermore, the Nazis made it clear that they would only use the forces of democracy in order to extinguish it. They proved, as all Socialists believe, that Democracy (mob rule) is the path to Socialism.
When I refer to lawfulness, I refer to the concept of the Law of Natural Rights endowed upon us by our Creator, which all Socialists disdain, prefering to proclaim themselves gods, and endow us only with such rights as they wish.
The problem with the terms left and right is that they are relative. Relative to a right wing American Conservative, (someone who believes in the Constitution) all Socialists, Anarchists, and other assorted misfits are leftist. Compared to Monarchists, Republicans are leftist. The Founding Fathers most certainly thought of themselves as Liberals in this classical sense. The Nazis saw themselves as a balancing force (Hegelian synthesis) between the forces of Revolution (communism) and Reaction (monarchy). Relative to the Monarchists and democrats, they were leftists, but compared to the Commies they were rightists. (But that's not saying much, is it?)
Militias are not anarchist, but they are rightist libertarians, just like the founding fathers. They are conservatives who believe in Constitutionally limited Federal government. No anarchists believe in the Constitution. If some paramiltary group advocates the overthrow of the government, then they are most certainly not right wing. Likewise, leftists who advocate the unconstitutional growth of government power beyond that mandated by the Constitution, are most certainly not to be considered 'excessively lawful.'