Well they are the leadership of the party and all but maybe 10 if you stretch it in congress. So RINO IS the Republican party now.
The Cruz/Lee types need to leave before the association taints them.
The term "RINO" has really outlived its usefulness because it now means exactly the opposite of what it originally meant. In a very real sense, Ted Cruz is a RINO, because though nominally a Republican, he stands for something very different than the party in general. And thank goodness for that!