Purist conservatives are like idiot hipsters who can't like a band that's popular. They believe that a group with any kind of a following can't be a good band, just as show-off social conservatives consider it a mark of integrity that their candidates- Akin, Mourdock, Sharron Angle, Christine O'Donnell- take wildly unpopular positions and lose elections.
It was the same thing with purist libertarian Barry Goldwater, who... nearly destroyed the Republican Party with his pointless pursuit of libertarian perfection in his vote against the 1964 Civil Rights Act.
(No, I'm not going to give a link to her site. I don't want kgbreport.com showing up in her server logs.)