I honestly wouldn't be surprised if flat earther people were plants in our community set up here to delititmize us and make us look crazy.
Flat Earthers are insular and ignorable.
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To insular and ignorable, could be added:
myopic, brash, hypercritical, repugnant, dense, hard-headed, malicious, proud, haughty, stodgy, fulminating, self-contradictory, hypocritical, quixotic, hyperbolic, impracticable, pretentious, presumptuous, rash, insolent, deleterious, abrasive, over-emotional, obtuse, pertinacious...
Yeah, that's the word I was looking for,
pertinacious.
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Pertinacity in action!