agreed. humans are the only creatures capable of conceiving hate as well as evil. have you read about stoicism? i started getting into it around the same time i revisited therapy around 9 months ago and it has significantly motivated me to seek a healthier road for myself and those around me, starting with acknowleding my own flaws, wrongdoings, vices, errors, as well as positive traits . of course there are many other philosophies, doctrines, you name it, explaining this passionate emotion which usually stems from sadness. marcus aurelius' lead a stoic life and in his journal "Meditations" you'll find a number of entries explaining the nautre of hatred quite well.
and i know some people are rubbed by him the wrong way, but Jordan Peterson has written about hate, too.
I've been working as an office clerk at a seafood processing plant in Alaska for the last 2 months clocking 15 hours daily and, in short, for some reason i'm not as irritated, or hating, my fellow coworkers when in other years i would clash with their personalities or whatever differences we had or i found annoying.
maybe it's my aging, or therapy, meditating, journaling, stoicism or neither, all i know is I've felt at peace with myself and others like I've never been before amid these uncertain times of pandemic, protests, some infected family members, and a potential divorce. I'll never be free or immune of hatred, and although peace doesn't necessarily mean a life of happiness, it has given me a sense of purpose and looking forward what the nature unfolds.
ps. i remember ted barrow posted on one of his many stories of him going off and bringing up a book or essay about hatred, something along "defending hatred" or something like that by this dude from the 1500s i think that i found interesting but lost the name. any clue of what im talking about?
edit*
found it
"on the pleasure of hating and other essays" by william hazlit
https://www.amazon.com/Pleasure-Hating-Other-Essays/dp/1975732073