There is no means by which a group, let's call them 'government', can defend myriad individuals from myriad criminals. Cops can't prevent crime - unless everyone that could possibly commit a crime is held captive. Cops can only show up after any survivors call them to inform them a crime has occurred and take a report.

People have to defend themselves, and then criminals will not have defenseless victims to criminally harm.

In fact, because people do not understand that cops cannot prevent crime, and misbelieve that cops can protect them, they do not undertake the necessary investment in security, becoming defenseless potential crime victims and attracting the interest of potential criminals. In this way, cops cause crime, just by existing and enabling lying politicians to claim they are preventing crime by funding police. Of course, there are also cops that commit crimes, which makes the problem even worse.

The only people that can prevent crimes from being committed are potential victims who secure their persons and property robustly. When rapists, robbers, and murderers are shot and killed when attempting to commit crimes, those crimes have been prevented, and that is the only way crimes are ever prevented - although not all criminals die when their attempts to commit crimes are prevented from succeeding. Some of them may live to die in prison.

Cops cause crime. Only armed and well trained civilians can prevent it.

Thanks!