The Police didn't just standby. They escorted them there; Islamist's from Halifax and all over the England. The religion of peace in action aided by the forces of law and order...
Police uphold the system. Protecting the citizenry does not necessarily coincide with that anymore. While there may be good people among them, facilitating or tolerating these types of abhorrent actions should count heavily against them. England is well on its way to a civil war and the police that side with the enemy should be ashamed to wear a police uniform.