No it does not. It happens because of socio economic problems. When people immigrate, they generally come from poorer countries and as such end up living in harder circumstances in the UK. It's a vicious cycle. I'm a Londoner myself and there's nasty chav estate's, black estate's, Asian estates etc. All are privy to crime, violence etc, and the one thing they all have in common is socio economic standings and education standards.
Think, there are stabbings, murders etc all the time in the UK, yet this case will get blown out of proportion and be used to promote all sorts of different right wing agendas. Just the other day an off duty officer was shot to death in Essex, compare the kind of coverage both cases are receiving. One is a crazed mad man, the other is a Muslim terrorist.