I had a debate with my teenage daughters yesterday whether Trump was evil (all agreed), nice (all disagreed), stupid (they agreed, I did not). I explained that he's a fool wielding a very powerful tool. And we all suffer his greed. But in the end of the day, he's still a fool easily swayed by throwing a couple of dollars his way.
They change your strategy. Incompetent people can be steered away from damaging actions. Malicious people are steering themselves towards doing damage, and you need to oppose them directly.