Interesting read by Jonny Thomson who teaches philosophy in Oxford.
https://bigthink.com/thinking/bonhoeffers-theory-stupidity-evil/
I tend to agree with it.
Theory of stupidity
Bonhoeffer’s argument, then, is that stupidity should be viewed as worse than evil. Stupidity has far greater potential to damage our lives. More harm is done by one powerful idiot than a gang of Machiavellian schemers. We know when there’s evil, and we can deny it power. With the corrupt, oppressive, and sadistic, we know where we stand. You know how to take a stand.
But stupidity is much harder to weed out. That’s why it’s a dangerous weapon: Because evil people find it hard to take power, they need stupid people to do their work. Like sheep in a field, a stupid person can be guided, steered, and manipulated to do any number of things. Evil is a puppet master, and it loves nothing so much as the mindless puppets who enable it — be they in the general public or inside the corridors of power.
The lesson from Bonhoeffer is to laugh at those daft, silly moments when in close company. But, we should get angry and scared when stupidity takes reign.