Hatred exists in opposition to the inability (or the perceived frustration) to change something. If society evolved to adapt, hatred evolved as the entropy within the system of balance, and by it's very nature is necessary for the challenge of society to address it; and not yield to antithesis. If society produces evil it is because people did not have enough hatred to oppose it--instead merely conceding to it's evolution--and without change, society is no different, to not correct the course of hatred, to what is the perceived benefit. The problem of course is that people want to always believe they are right, and rarely is it common that people have been conditioned to think otherwise.
The 'enemy' to the 'hero' always thinks he is right, and from that, hatred breeds. . .
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Regret is pathos--in the moment--of believing that the present and its outcome, would have been better served with hindsight, of its inevitability.
Not being tempered by resolve, regret is ephemeral as with ativism of the moment, the foregone conclusion of invalidation of choice (and not everyone has a choice) is the tendency to remain copacetic with the limitations of that experience.
When people believe things would have been different, they are often in denial of what brought them there; what tipped the edge or what set in motion the decision that would have made something irreversible, and was it not AT THAT MOMENT something that would have been redeemable to the outcome?
If by assuming that actions have meaning, it is best to learn from actions, so to address them, rather than to be controlled by them.
"Empty your mind, be formless. Shapeless, like water. If you put water into a cup, it becomes the cup," so says, Bruce Lee.
For others the conversation might go like this:
Cheech : "This is not the key. I want the key." Timothy Leary : "That's the key to the universe."
http://www.morethings.com/fan/cheech_an ... lery02.htm