It’s not about combatting the state and more of supplanting the state. Where the state has abandoned the streets to crime a local neighborhood watch can pick up the slack. People can then pay their neighborhood watch and vote to cut their local government taxes. The state is strangely ok with a high degree of street level violence in that it mostly affects those without power and provides a continuing justification for increased state powers - actually fixing the problem would undermine the justification. An example of this would be in South Africa where private security is playing an ever increasing role in policing. Once private security becomes large enough they become a real threat to the government as they are usually better organized and suffer less corruption.