it is impossible for mayors or cops to learn positive lessons about protest response because they all have two immovable beliefs: 1. it is evil and childish to hold police officers accountable for violent acts 2. cops must be present at all times during protests
The lesson Frey and Walz were supposed to learn in 2020 was that sending riot police to a peaceful protest creates a confrontation that results in some dipshit cops shooting people in the eye with a gas canister which then we have to goddamn pay for in settlements while also our city burns.