I agree, except that some of my own wacky thought (well, it's hardly original, of course) basically says that nonsense isn't a "bad" at all - not for anyone whom we might reasonably call human. For example, as has been pointed out here, people have in-built hypocritical mechanisms to cope with various kinds of "faith", but if you truly consider that you're doing something "rational" and commonsensically correct, you're left driving at an enormous speed without brakes, and the likely damage might be great enough that no-one should ever aspire to "rational" thinking.

Also:

On a wall in South London some Communist or Blackshirt had chalked “Cheese, not Churchill”. What a silly slogan. It sums up the psychological ignorance of these people who even now have not grasped that whereas some people would die for Churchill, nobody will die for cheese.

• Orwell's diary, 20th March, 1941