Men are chaotic by nature, interpreting any law by whatever suits their appetites. For examples of secular Chaos, try the first election of George W. Bush, Lincoln's abrogation of the Constitution during the civil war or for that matter ANY war that American presidents have gotten us involved in without consent of congress, Roosevelt creating internment camps for American citizens of Japanese descent or the fact that one court often overturns the findings of a previous court; so much for eliminating the chaos.
in a multi cultural, multi religious society, secular law is the only way to protect the rights of all....
Secular law only satisfies the whims of secularists, multi-culturalists and multi-religionists; it thinks precious little of American citizens that do NOT subscribe to secularism(Christian? You have to pay twice. Taxed for the secularist government schools and on your own for paying for private schools). Those who believe that American culture should be taught and promoted in American schools rather than multi-culturalism are also given a back seat (if any seat at all) As for religion, we were essentially a Christian nation and other religions enjoyed freedom here specifically because of the libertarian nature and moral ethos of the Christian faith. Those who undermine Christianity in America ultimately undermine trheir own true freedom.
If you are using current definitions of the term, "libertarian" and Christian are not in the least bit related. In fact, Libertarianism is the antithesis of Christianity.
You might have meant 'liberal,' in the 17th Century sense, which would be less a slur on Christianity.