Not that familiar with this particular case, but it seems to me that the SCOTUS is just saying that municipal police forces are not liable if they fail to protect you, which is a good decision, given the potential for lawsuit abuse. Their job is to attempt to protect you by enforcing the law, and failure to do so does not open them to liability. It is up to the citizens of said municipality to extract revenge by demanding a change/firing, or voting the responsible police chief/sheriff/city official out of office. Public service incompetence is not limited to the police force, but is more visible.

Pump shotgun, first 3 shells #4, last 3 shells 00 buck. Top shelf, bedroom closet. Ideal for home-defense.