Most RP supporters actually aren't conspiracy nuts, but thanks to the peanut gallery for trying. That stereotype is about as stupid as the "most Obama supporters just wanted to vote the first black man into the presidency" stereotype - both groups are about as visible, a significant minority and hyped up by the propagandists opposing the men in question to be a bigger deal than they are.
Tolstoy essentially has it, inane obfuscation from Santa aside. The demographic in the GOP that's growing the most is the young (18-35) demographic, which consists largely of people who don't care about what two grown men in love do with their lives or about what a woman with a small clump of undifferentiated cells in her body decides to do about them. They're worried about a huge debt that they'll have to settle one way or another, a debt that's growing annually because of imperialism overseas (and no, sorry, consistent opposition to current levels of involvement overseas is neither isolationist nor anti-Semitic; were the tables flipped and the Jews in the Palestinians' shoes, there would be opposition to propping up Palestine against Israel) but also due to a bipartisan refusal to end gridlock and have a serious debate about economic policy. (And yes, it's bipartisan. Invictus is right to point out that the Democrats have no budget plan. Santa is right to point out that the Republicans are clearly sending proposals they know will not fly. Neither stance constitutes a significant effort to end the gridlock. And no, this isn't an orchestrated conspiracy by a one-party state in disguise; if it's a "conspiracy" then it's just a conspiracy by most individuals in the Congress to stay in office by scoring cheap political points and keeping their corporate donors happy while pulling in nice salaries for themselves. I don't think that's quite the same thing as believing in Reptilians.) The old people Tea Party wing is just the same old guard revitalized because the Blue Team won big in late 2008; the fact that they're all lining up behind Romney is evidence of that.
So no, sorry, the libertarian heretics aren't all or even mostly conspiracy nuts. This smear, like the others, is a transparently obvious and cheap effort to avoid substantive engagement on the issues.
As for Romney? Should have picked Jindal. Do me and the rest of Louisiana a favor if you're gonna pick someone to energize the base, man!