There’s nothing to “get away with” here.
Here's what I think you're all about, and I think it is a flaw in your thinking.
Not every republican is conservative, I take it we agree with each other on this? Those who are not conservative, like John McCain (and you know he's not) are trying to make the republican party in their image, moderate/rino. These people are centrist, Washingtonians, and system wonks who want the staus quo because this is where they've learned they can derive power. They are elites and do not concern themselves with the people's agenda, but their own. This is what you fail to recognize and you can not survive as a prosperous party with people who only have their self interest at heart. Now if John McCain wants to come over and embrace a conservative agenda fully then I welcome him, but all he's ever done is rail against conservatives and voted to stop a conservative agenda!
So, if you don't understand the difference between someone who's only voting certain ways to further a more moderate agenda, opposed to someone who actually is conservative and cares about "We The People..." then you are totally out of touch with what is this political reality.