Many (most) Libertarians don't actually understand Libertarianism. Here in the US it has morphed into 'personal responsibility (unless I personally need a government handout), guns, and I get to do anything I want and no one can stop me'.
Which is *far* from the original ideals of 'non coercion' and 'non aggression'. Forex, the principle of 'swing your arms any way you want, so long as you don't hit anyone else', LITERALLY means 'do not pollute' and 'do not play your music loud'.