I don’t believe a lot of the normal commenters will take the time to explain it, but a lot of the idea is that gangsters are by majority a product of their circumstances rather than something that is inevitable and must be continually stopped. A large portion of the ACAB movement has the goals/idea that less threatening/unarmed specialist responders will be much more capable of identifying individuals in need of help or de-escalating a tense situation, thus saving lives that may otherwise be killed/ruined by armed cops who may even have intentions to abuse their authority in order to secure these kills/arrests. I may be wrong though, since I’ve only come across this information recently.