This actually happened 2 years ago, and the police response was to cover it up.

Police 'covered up' violent campaign to turn London area 'Islamic'
Victims say that officers in the borough of Tower Hamlets have ignored or downplayed outbreaks of hate crime, and suppressed evidence implicating Muslims in them, because they fear being accused of racism.
The claims come as four Tower Hamlets Muslims were jailed for at least 19 years for attacking a local white teacher who gave religious studies lessons to Muslim girls.
[link to www.telegraph.co.uk]

Isn´t the police supposed to protect the good british citizens???