I disagree, but it's probably a matter of definitions. I don't want to play with words, so I will concede that cognitive ability is independent from moral reasoning (which is socially enforced). However, this is not what I'm getting at. Cognitive ability ("intelligence") is correlated with optionality and power. Your ability to change this reality is correlated with your cognitive ability.

If you truly are an intelligent person, would you really find no other ways to use your talents than to inflict harm, exploit others, and make our shared reality a worse place? That would be a waste. I won't get into ambiguous cases and moral relativism. Say we can all agree that some things are "evil": child exploitation is evil. Throwing molotov cocktails at a civilian's house is evil. Sending bombs in the mail is evil.

Now what would you call someone who engages in these kind of activities when they could easily do something better and more satisfying with their lives? I'd say they're pretty stupid. They're probably good at fooling other people into thinking they're smart, but their behavior shows otherwise.

Take for example Ted Kaczynski, a terrorist who is worshipped like a saint and a prophet in certain ideological spheres. Ted Kaczynski is supposedly this 140IQ genius who saw it all coming and tried to warn us. But if you actually read Industrial Society and Its Future, you can see it's complete incoherent garbage, the kind of stuff I was writing when I was 12 to troll on internet forums. Ted Kaczynski is what a stupid person thinks a smart person looks like.

A smart person doesn't need to be evil, just like a billionaire doesn't need to go shoplifting. I'm not saying that stupid people can't be dangerous. But they should be dealt with for what they are: stupid people, inferior to us, worthy of pity. Not powerful monsters above us that we should fear.