Web3 is the closest analogue in recent memory, but if you go back further to the pre-enlightenment era (and some pockets of more recent history, particularly in isolated rural/colonial regions) you can see similar behaviors. It's mad religious fervor coupled with poor education. They see what their beliefs tell them they should see, and lack the mental rigor to analyze the actual data. Not their fault! It's our fault for letting them into the profession. Other disciplines are much better at keeping these folks outside the gates.