It's this kind of self-contradicting conservatism, bordering on lunatic libertarianism..."
Two things: 1) Libertarians are strongly against any form of national ID, and this author's casual classification of libertarians as lunatic is incredibly childish.
2) Although I agree with the author that national ID is a bad idea (TM), his comparison here is quite off the scale: the president of the united states is not only significantly more powerful than one person with a gun (he controls thousands of people with guns, and nuclear weapons). In addition, there are legal requirements for office that can be verified by a birth certificate (age among others, and I won't be debating the value of these legal requirements), whereas the federal government EXPLICITLY has no jurisdiction over gun ownership. And these are contradictory laws passed recently by a transient legislature - this is the Constitution of the United States of America. A document, without which, there is no legality of the United States.