"Evil" is just a not quite determinable degree of indifference

This definition of 'evil'/'profound stupidity' (knowing you're causing a greater degree of harm and just not caring), just means being indifferent to suffering. All hatred is actually directed at what is perceived to be indifference to suffering. But provided it's even correct that the person is being indifferent, they are doing so because of this so called "profound stupidity" (which could use a better name I suppose) and not because they are "evil". The rest, and that's a hell of a lot, is just mistakenly assuming other people are "evil" when they're not.

This mistaken perception leads people to try to punish people (use force) instead of using reason.

I've been amazed at how badly vegans treat one another. Perhaps it's because while they might be less indifferent, they are just as bad as everyone else at incorrectly perceiving "evil" in others. And when they do, they turn to anger and force pretty much the same as everyone else.

Does labeling 'evil', "profound stupidity" actually change anything? Yes, the person won't be full of anger. Beyond that? Because you're not showing anger the possibility of reasoning with them is improved IF it turns out the perception of "profound stupidity" was incorrect.

It doesn't totally solve the problem. But it does help in at least these two ways.

The two fundamental problems of this world are indifference to suffering and the misperception of indifference to suffering.

The only thing to lessen the first is training young minds to empathy and increased understanding. For the second it can be helpful to not think in terms of evil/hate/anger. Further simply improving communication through better honesty. The main thing holding back honesty is the reality of what a violent world this is where force is so prevalent.