You are right, though your snide tone is not. Conservatives vote *for* Conservatives. By now, one would think that would be expected.
MccAin't does not represent Conservatism to any degree, and cannot be defended on that ground. Why expect Conservatives to vote for him? By what right is the Conservative vote reserved for him?
You just vote for some little 3rd Party and feel pure while we Republicans deal with the real political world.