Despite all the pretence about serving the people, and some of the genuinely good and difficult work police have to do, such as dealing with rape victims and missing children, the police are primarily enforcers for the state and for the state of things as they are. When this is understood you can make sense of ‘illogical’ police activities like spying on justice campaigners or environmental activists as if they were the Mafia, to the extent of going undercover and marrying members of activist groups.