Maybe we should just define “true Protestant” as anyone who calls themselves Christian yet rejects the Catholic Church’s teachings. After all, the people you mentioned (and more) all at least have in common the fact that they hate Catholicism.
Wait, that’ll just put us back where we started...< sigh > ...it’s so difficult to please those who hate the Church.
Good thing we’re all conservatives who reject “political correctness” though! < /sarc >
It would seem that way. But then that would include CB's gap theory, metmom's anti-Calvinism, the Jehovah's Witnesses and even Mormons