If the Republican party won't listen to us, we will make sure they never win an election again. They need us. We as evangelicals make up a full 1/3rd of the U.S. electorate.
If we stop voting for their RINO candidates, they will stop sending them to us.
And why should we stop at the primaries? Why not form our own 3rd party, until the GOP comes to its senses? We make up a over a third of the electorate! We can win all kinds of state and local races, plus some national races in the house and senate seats. There's nothing stopping us from taking the presidency either. While the demonrats and RINO's fight over 63% of the voting public, we will come in with a solid well oiled and in line third every time, without fail forever and ever.