Why is there a confrontation in society between law enforcement agencies and citizens? How to prevent?

First, clashes between the ordinary population and law enforcement agencies always arise out of distrust in them. When there is no trust, when a citizen does not look at the policeman as a person who is ready to protect him, then problems begin in society. Sometimes such clashes can lead to large-scale promotions. To prevent this, the state and law enforcement agencies need to establish contact with the population, show their positive sides, and not vice versa.