I have an actual story I can tell about how a RINO did more damage than a liberal DemonCrap ever could:
Mario Cuomo, Governor of New York, tried to get an assault weapon ban in at the state level for years. Decades, even. He failed because of the Republican NY Senate.
In comes RINO George Pataki. He decides he wants the same bill. It passes on the first attempt BECAUSE Pataki was able to call in favors and apply pressure in a way that Cuomo couldn't.
RINO's are MUCH more dangerous than flat-out liberals.