You really need to up your meds. The "true believers" might think that, but the squishy middle is where the wins exist - hard right wing and hard left wing candidates cannot win elections based on a hardcore message. Bottom line is that to the middle, the GOP represents a group likely to apply thoughtful, considerate, measured force against crime, warlike states and terrorists. With regard to foreign policy, it will be robustly pro American. Domestically, it doesn't "knee jerk" to the crisis of the moment, and will seek more measured resonses to economic and social problems.
That is the kind of message that sells to that middle.
If the GOP every goes pro-choice it its cooked. If the pro-lifers ever leave the GOP it is cooked. If the RINOs leave -- and they actually are, the country club set now votes Democratic -- it will hurt but the party will survive.
I can see it now. The RINOs leave and start their own website "Moderate Republic"