That might have something to do with the fact that the Democrats seem to be getting everything they want in their two leading candidates, while conservatives are already having to make concessions with our top three.
Give us someone who is truly a conservative, and you won't see so much infighting.
I think you probably would. You'll have people saying things like, oh, so-and-so is too conservative, I won't vote for him. OTOH, you get someone who is not a "true believer" in the minds of many, and they'll say, well, that stupid so-and-so, they're nothing but a RINO, I'll stay home this year to teach them a lesson. And so the country is handed over to Marxists and socialists among the 'Rats.
BTW, in my state, a moderate-conservative midwestern state (not a bastion of Northeast liberalism or a left coast state of leftist wackos), we ran a "true conservative" for Governor. He got clobbered, absolutely creamed, losing something like 60-40. You saw the same eat-their-own dynamic in play. Keep it up and we'll have a replay of that on the national level come 2008.