The mistaken belief that scientists have "proven" that the current warming trend of the global average temperature has anything to do with human activity.
A strange, almost religious-like zealotry has permeated believers of this propaganda, to the level where scientists who dare to conjecture that maybe we can't yet prove that man is causing global warming are fired, forced to step down, denounced as "oil company shills" etc.
Believers also are known for being high outputters of eco-shame. They will slash the tires of your SUV while drinking the sweat off a poor man's back.
Bob: You know, I read somewhere that polar bears can swim quite well, a trait they evolved thousands of years ago when it was much warmer than today.
Joe: Whatever man, I'm signing this petition to stop Africa from using coal so they don't ruin the world man.