I caught a little bit of Ran Paul on the Racheal Maddow show last night, and the guy seemed unable to answer a simple questions. Maddow kept asking him if he supported the Civil Rights Act and he kept trying to make some sort of vague argument about guns in church; which I think is part of the problem with libertarians as a whole, there ideas sound great in a philosophy paper but fall apart pretty quickly in practice. In fact I think you can probably say that about the entire conservative movement.
Obvioussly in the case of Rand Paul he knows that he would offend his followers if he said he supported the civil rights act, but he would offend the rest the country if he came out against the civil rights act, so instead he talked about guns in church.
For a better discussion of this see Pandagon