/johnny
We haven't had an actual conservative nominee since Reagan, yet conservatives are politically savvy enough to know the Republican RINO is better than the Democrat Socialist. The vast majority will rally to the nominee. You may not this time around, but many people I know who refused to vote for McCain regret it now and will hold their nose and vote for Willard. There is always a few that go back and forth like this every cycle.
One of the only ways to prevent another Republican hug-the-center squish from being nominated next time around is for conservatives to actually find a candidate and agree to support him or her early on. Unfortunately, conservatives are far too divided to even accomplish that. All it takes is one social conservative, scripture quoting candidate to enter the race and play spoiler like Huckabee or Santorum and the remaining conservative vote splinters to pieces. Unless this changes, I don't have a lot of hope 2016 or 2020 will be any better. Any conservative 3rd party someone tries to start (again) will be torn asunder by the same conflicts.