If we ever had an honest, no-nonsense, courageous conservative as our nominee, that circular firing squad wouldn't amount to more than a few lone voices on the far extremity of the conservative voter base.
Elevating squish liberals to the Republican nominee position, guarantees widespread infighting, disillusionment, circular firing squads, and lost presidential elections for our side.
Not sure that it will be a problem in the future. Many who disagreed with the direction of the GOP and who were not happy with Romney have merely left the party and given up. I think that the GOP will manage to chase off the last of the conservatives in the next couple of years. The GOP has been neutered, and conservatives have been banished to the desert. You will see conservatives vote for the few conservative candidates who manage to sneak past the GOP machine. Other than that you will see lots of GOP candidates lose to Dems in 2014.