Since Angus and I have in the past disagreed about John McCain, perhaps it is not surprising that we also disagree about Bob Barr. (I should note that Angus really only claims that McCain is easily the best of the available candidates, not some kind of ideal.)
I have discussed this a bit elsewhere, as some have noticed.
But, in regards to Angus' questions (which, I should note, are perfectly fair questions):
1. Ron Paul has said he would have supported the Defense of Marriage Act, for the same federalism reasons as Bob Barr. And, I have heard Bob's discussion of this at the LP Convention, AND have talked to him about it at length in private. It is quite clear to me that he wants the federal government out of the "regulation of marriage" business, and that is at least a step in the right direction; it's a libertarian position. If some folks think it isn't libertarian ENOUGH, they are entitled to their views. But many of those folks aren't registered to vote, and don't consider the Libertarian Party to be anything important anyway.
2. As for the immigration/English only question, it is fair to say that the LP is divided on this issue. LOTS of libertarians, and some Libertarians (big L), agree with the idea that we need to control immigration. It happens that I would be for open borders as an ideal, and anything closer to that as a policy direction. But I get LOTS of argument about this, from voters. In fact, a lot of voters who would otherwise support me tell me they CAN'T, because of my stance on immigration. So, while Barr's view is different from mine, there are LOTS of Libertarians who agree, and it is a clear vote winner.
Look, the most the Libertarian Party has ever gotten was 1.1%, in 1980. And, as I have said before, I clearly remember that Angus CLAIMED to have voted for Ed Clark that year, though of course it may have been a jest. If in fact the Libertarians got 5% this year, that would make a HUGE difference in many ways, at every level.
Bob Barr is my man. I have already contributed twice, and plan to max out my contributions, up to the limit prescribed by law.
For more details on Bob's position, and whether a check of the record says he's a Libertarian, check this very fine post.