I agree, violence is not the answer, but getting to that sort of a society always seems to be the challenge. Even HG Wells' proposed solution of putting criminals on Islands is not without flaws.
https://tubitv.com/series/3254/the-prisoner
"Number Six (Patrick McGoohan) was captured and imprisoned in The Village, a mysterious place where all residents - guards and prisoners alike, do not use names, and instead are assigned a number."
No one can ever truly leave the Modern Utopia. As Agent 6, now John Wick, shows us, you'd have to try to tear the whole thing down yet at the end, he still had to make a deal with the High Table. No Escape.
https://tubitv.com/search/john%20wick
"..Chapter 5 will take the franchise in a completely new direction. The High Table storyline, which was the main focus of the first four films, reached its conclusion. The fifth installment will center around an entirely new storyline and emotional stakes..."
There were plenty of familiar things in A Modern Utopia that more accurately describe the world we already live in, however there is still much left to be wanting, to achieve even that ideal. Soon, generations will be born that are truly engineered to live peacefully inside the Brave New World, and only an outsider Savage like John will find it unbearable. But what of Freedom? What of Love?
https://www.plato-philosophy.org/wp-content/uploads/2016/05/BraveNewWorld-1.pdf
In 'Shape of things to come' the scientific brotherhood of mankind elevates itself above nation-states ruled by Tyrants. We aren't quite there yet, still isolated by the ideologies of autocrats and despots. The people still gripped by their tribal natures, unable to see through the fog of ignorance. I feel like we are in an age of unreason, but perhaps in time a return to rational thought will lift us into that hopeful future.

"For the first time in history the mind of man was really attempting to control his destiny. Hitherto usage, tradition, external necessity, accident, had furnished the unchallenged framework within which he had devised his explanations and his consolations. He had resisted any clear knowledge of his own nature and romanced about his destiny. He had evaded responsibility for his stresses and disasters by putting his faith in overwhelming gods; he had clung to arbitrary rules of conduct against all reason, and he had persecuted and sought to destroy every skeptical thinker, every heretical experimentalist in conduct, who disturbed the equanimity of his submission. He preferred familiar miseries to the mental torture of novel effort"
We must continue learning and advocating for the ideals that are rarely today taught, and so easily forgot. All this to say I agree with your sentiment, "The only real solution involves the rejection of rule by force, imo. As long as these people get to kill those people because reasons, we will always be gruel for those most adept at hiding their killing."
RE: The Daily Meme #938!