The GOPe is already on the warpath against conservatives
That is quite understandable. Tea partiers are trying to change the norm of 50 years what the GOPe is used to and comfortable with.
If politically savvy candidates are fielded against the GOPe backed candidates, the chance of winning is good. For example Cruz & Paul. Both defeated GOPers and won in general.
It does absolutely no good to field candidates like MOurdock, AKin, O"donnell, Hoffman, etc because they lose in general to liberal democrats. Result is even worse than GOPers. That is the reality.