Let us presume that he and I took the Hippocratic oath. Which of us was more successful in 'first do no harm'? 😉 Him with all his misplaced effort ,or me with my laissez faire attitude ? Sometimes doing nothing might actually be better than doing something.
But neither of you did take that oath. And the harm he has done is just by your judgement. And what harm are you unaware of that has occurred because you took the position you did? Could you not have taken a sniper rifle and taken aim on him and had a more positive effect overall than the combination of you both has had? Are you willing to take responsibility for the harm he has done (according to you) because you did not take him out?
I remember reading, possibly Taleb, or maybe Kahneman or Tversky, about one of the biases that evidence themselves in human bahvior. An example was given of a person who invented a hijack-proof airplane cabin door (with associated protocols and procedures) that would have prevented 9/11. Would they have had their statue unveiled in Central Park? No, of course not. Because their invention would have prevented 9/11 and the benefit to mankind gone completely unnoticed and unnoticeable. They would have taken action and become a hero had people known the consequences of them not doing so, but the nature of the involvement and implementation and its effect would have caused not a ripple on the global human consciousness.
Take that same person and same invention (this is my work here onward) and both pilot and co-pilot (and navigator) coming down with food poisoning and become unconscious. Nobody can get through to the cabin to take the controls and the plane crashes killing everyone on board. Hero or villain? Certainly no statue in Central Park.
My point is that you can take action with good intent and the result can either be good or bad – you have no control over that. Or you can have the wherewithal to judge not taking action with good intent is the best course of (in-)action and the result can be either good or bad – you have no control over that.
The thing is, these two options are not equally weighted nor do they impose equal culpability.
There is a tendency for far more to claim the laissez faire as a justifiable mode of conduct for the simple reason you can use it as a counter-point, in retrospect, for just about any human evil or terror perpetrated on humanity deliberately or accidentally. But there is an explicit silence around those events where such an approach would have been counter-productive. Basically, you can step up to the plate after stepping up to the plate can be shown to have been a bad thing to do and claim victory for inaction. But when stepping up to the plate was the right thing to do you do not have to step up to the plate to apologize for not stepping up to the plate - you just keep your head down.
I’m probably aiming high for the Nobel prize for this – but you have to start somewhere.