If all it takes are crazy beliefs, I could come up with strong justifications for every single member of congress for which I'd find supporters. Do you believe in a spaghetti monster flying through the sky? An invisible omnipotent being in the sky not named God or Allah or Elohim? Mother Gaia? Any supernatural being, no matter the name? Guam may capsize? The world will end in 12 years? Obama was born in Kenya? We exist inside a computer simulation? The undead? Lucy in the Sky with Diamonds is not a reference to LSD? Moon landing was faked? Moon landing wasn't faked?
I could go on. To complicate things even further, what was crazy 100 years ago may no longer seem crazy and what is crazy now might not be seen as crazy 100 years from now. Who knows, maybe Guam actually will capsize from too many people living there.
To be clear, I think MTG is crazy or at least has said some pretty crazy things and in a sane world she wouldn't have been elected in the first place. However, it is tough for me to objectively say that she or her beliefs are any more crazy or bigoted than any other member of Congress and so I can confidently agree and say that this precedent will used in the future by one party against members of an opposing party that may or may not deserve it. In fact, I'm pretty confident it will be expanded to eventually expel members of an opposing party from Congress. If convicted of criminal acts, it is a different story of course.