Massacring everyone is too bloody, and it would be troublesome to settle scores with the various gangs and factions that have followed us here.
Instead, these "troublemakers" who either refuse to undergo surgery or have failed the procedure have finally all gathered together. Expelling them from the country outright can restore calm to the city once again.
Only by cutting away the rotten flesh can the remaining body grow healthy once more.
In this dark and chaotic era, it's nearly impossible for ordinary people without the city's protection to survive.
Whether these people die of thirst or hunger outside the city's influence, get eaten by other creatures, or realize the hardship of life outside and come back begging for forgiveness or scrounge to stay alive in the shadows, it's all good for the city.
With this as a warning, other city dwellers who harbor ambitions due to this act of defiance will be better able to appreciate the city's importance to every individual.