It is better to have a pipe in your mouth when you say this one. It will seem more scholarly. All taxation is bad. Be prepared for complete agreement from everybody. The government is the root of all evil.
Violence is bad, except in self defense.
Anybody should be allowed to own a gun. The list of prophets is long, including Ayn Rand and, my favorite anarchist, Karl Hess. You would swear that these folks were biblical heroes to read Libertarian publications. It's a little tougher to find an overarching authority, as freedom lovers tend not to follow the dictates of authoritarian figures. So, the problem is resolved for Libertarians by making the Constitution of the U.S. the overriding authority, which isn't such a bad idea, since it is the core document of the country that is the most nearly free of any that has ever existed.