When the police fear an “incident” more than they fear what happens when there is no law this is the result.
This is not how to deal with childlike aggression and that’s exactly what this is. Immature adults acting like children whose parents are afraid of their tantrums.
When a child acts like this they need to be disciplined. Right then. Punished in whatever manner bothers them the most with the thought that they’d rather behave than endure future punishment. They should not be allowed to continue to act out while parents slowly back away hoping the tantrum doesn’t get too far out of control