And this is typical Hollywood redirection.
Psychopaths know they are doing evil.
And enjoy it. They enjoy spinning yarns about how they are doing it for the greatest good.
And, since we are all indoctrinated in this govern-cement schooling, materialism science bullshit with a corrupted religion (as control instead of spirituality) we cannot see why "the greatest good" is a lie.
They greatest good actually comes from following your highest joy. (this includes getting other people to be joyful)
The adage, "the ends justifies the means" is completely false.
And we would recognize that if we were taught any truth.
You can't get to happiness on a path that does not contain happiness.
A path to any destination always includes attributes of that destination
So, i would suggest that we stop believing in this gray area. That only exists for humans with a conscience. There is only black in the hearts of the psychopaths. And no good will come from them, unless what you want is destruction. (such as Chump is doing)