“It seems to me that people either support the Constitution or they don’t, and that it’s fairly easy to assess which group a given candidate falls into. Perhaps you have different standards for your voting.”
Here is my standard: My primary is February 5. I will vote for the candidate who is most in tune with my conservative views. I will do the same in the general.
You may vote by whatever standard you wish, or stay home. I don’t care what you do. For all I know, all you screamers are Dem plants, trying to elect Hillary.
OK, but you ought to be aware that this behavior rewards the party for its drift toward liberalism, and therefore incentivizes more leftward movement in the future. If the GOP knows it has conservatives' votes tied up no matter what, they have every reason to try to attract "centrist" and leftist votes. Only if there is a perceived risk of alienating the base will the party be pulled back toward the right.