Lobbyist and Interest groups basically influence legislatures to pass their wanted laws/amendments. lobbyists are hired usually by a businessman/corporation. Interest groups do the same thing but are more for the people. citizens may join them and help advocate for things. Lobbying is protected by the first amendment.
Instead of fighting against the police, the community can work with them and try and make even solutions for both the sides, also stregthen regulations for what police can do.