The GOP needs to campaign for and WIN the votes of conservatives. If conservatives refuse to vote for them, the blame belongs to the GOP for failing to capture that vote. Calling them a Hillary Clinton supporter for the failure of the GOP - well, you might as well say that the GOP is campaigning for Hillary and assign the proper blame there.
So you are against Ted Cruz?
I mostly agree with you, but some folks seem to be missing the point that the GOP isnt some giant monolith, but is made up of individual candidates who occupy spots on a broad political spectrum. Is it not debatable whether throwing down a blanket refusal to vote for all GOP candidates just becausr they choose to run with an “R” after their names is a good course of action or not.
So if you want to join in making the case that Ted Cruz is an unacceptable candidate if he wins the GOP nomination and runs under the GOP banner feel free. But expect a lot of pushback, valid pushback IMHO, from reputable Conservatives.