Don't forget; hate gives birth to more hate.
I think a major contributing factor is the persecution most Muslims suffer in European countries especially in the UK at the hands of numerous fascist groups. This gives rise to a sense of victimisation to minorities. They are often harassed and judged in public, therefore resorting to live in similar ethnic communities to avoid this type of harassment. These communities, with the passage of time expand to large minority populated towns and cities like Birmingham and Bradford. And when a people feel victimised, they tend to lash out and try to reject their association with what they see as oppressors. This can be seen as demands to implement Sharia laws in the constitution, hate speech by various preachers etc etc.
In turn, individuals, with supremacy complexities form their own groups like Britain First, EDL and BNP among others. This cycle continues and gains mass until it turns ugly and depressing.
I witnessed some fellows in their mid-teens a train I was on, harassing a couple of ethnic origin. The couple had a baby with them, asleep. The teens kept making loud sudden noises standing near the couple, disturbing the baby's sleep. The guy from the couple asked them if they could not make a noise around the baby. This simple request resulted in an explosive reaction from the teens. The stood over the couple and began shouting, 'This is England! I'll do what ever the f**k I f*****g want, you curry smelling bast**d. Let the train stop, I'll f*****g deck you.' The baby by this point was bawling, of course. The couple sat their in silence being shouted at. The rest of the passengers didn't do anything and pretended they didn't notice the 7 teens bullying this couple.
When the train stopped at a station, the couple rushed out followed by the teens. The couple ran to a near-by ticket inspector to complain whereas the teens ran off, howling.
That's why I think this entire issue is a two-paged story. You can't just read one and claim to know the entire story.