‘Stupidity is a more dangerous enemy of the good than malice. One may protest against evil; it can be exposed and, if need be, prevented by use of force. Evil always carries within itself the germ of its own subversion in that it leaves behind in human beings at least a sense of unease. Against stupidity we are defenseless. Neither protests nor the use of force accomplish anything here; reasons fall on deaf ears; facts that contradict one’s prejudgment simply need not be believed — in such moments the stupid person even becomes critical — and when facts are irrefutable they are just pushed aside as inconsequential, as incidental. In all this the stupid person, in contrast to the malicious one, is utterly self-satisfied and, being easily irritated, becomes dangerous by going on the attack. For that reason, greater caution is called for than with a malicious one. Never again will we try to persuade the stupid person with reasons, for it is senseless and dangerous.
Because stupidity can be used as a mask for malice
Plausible deniability … generally doing things and pretending that you have no knowledge or awareness of what happened so its not your fault and you have no responsibility
It’s modern day politics and race baiting these days … you say one thing to be an absolute turd and when you get called on it all, you deny everything, redirect, and ignore everything … your malicious self keeps hiding behind the mask of stupidity to keep doing whatever it is you want to say or do all the time … then do it again and again until your behaviour is so normalized that it’s no longer seen as malicious or stupid … it’s just normal now.
Also, a malicious individual can use stupidity of the masses to get in power and get their way