While I agree with Dunn that conservatives have to do a better job of publicizing conservatism, I fear what you said has more and more bearing on the elections. Sure, Romney and and other Pubbies could have had a more conservative message and the conservative establishment could have done a better job defending conservative candidates. But what if in 2016 we run a conservative candidate (here's where I disagree with Dunn...Romney almost ran away from conservtism), and we get beat again? After another disastrous four years from Obama? What then? It might be time for a split.
I personally don’t think beating up on Obama voters is a particularly bright idea. While everybody talks about Reagan, they seem to miss the fact that he respected all the voters whether they were likely to vote for him or not.