Yeah. On the surface it sounds crazy.

Everyone always says as if it is obvious, go back in time and kill Hitler. That this would be a overwhelming good.

But, if you go back, and he was a baby. At that time, there is no indication of evil, so you would be a baby killer, but for good. You would look crazy.

So, extrapolate that to present. Killing someone today, might also be seen as a universal good, but nobody would know it yet.

Is todays crazy, really crazy? or just not obvious yet. And some would say, it is pretty obvious.