"The establishment [GOP] wants to discard principle."
Wrong. The establishment GOP has long since abandoned any principles that it once stood for. It's no more than a mirror image political party that has all of the same vices as the Democratic party.
The GOP needs to find its libertarian roots - individual and economic freedoms and liberty are the keys and they should be the foundation for all of the planks in its platform. From immigration reform, to the 2nd Amendment, to Roe v. Wade, to a balanced federal budget and everything else in between.
The elites in the GOP are nothing more than self-interested exploiters in the exact same vein as the prog-libs in the Democratic party. They're all parasites.