Man. Trying to decide what load of crap to address first was difficult until I realized that since the whole article was based on this flawed premise, the details didn't matter. Consent and morality are two totally different animals. While they may agree at times, often they do not. If you were to state that 'libertarianism holds that consent is the the basis of legality', it might be closer to accurate, but then that makes the rest of the article pointless. Your aticle equates morality with legality. Using the Christian idea of morality (which I personally ascribe to) as a basis for legal code is the definition of a Theocracy.
All laws are based on morality. Christianity has always been recognized as part of America's common law.