I don’t think the disposition of this individual has any bearing on whether the police should protect them from criminal acts of aggression. The police should protect all equally.
> people who argue that fire departments should be an opt-in service, yet still get angry when their house burns down
Who are these people? Can you please bring up one specific example of a person who (1) expresses those views, (2) lives in an area where fire service is opt-in, (3) didn't opt-in for fire service, (4) had his house burn down and (5) is upset about not receiving help?