This riot wasn't really a reaction to a handful of National Front. It was all about Muslim youths, sometimes fired-up by the SWP and other leftists, showing their power and presence to the infidel authorities.
Riots occur almost every day somewhere in the Muslim world. Pakistan has a riot almost every week - and most Bradford Muslims are descended from Pakistanis and still visit that violent hell on a frequent basis.
Violence is how Islam expresses itself. To Muslims, jihad is the physical and political expression of Islam, whether that be riots, assasinations, military conflicts, the Narco-Jihad, destroying infidel girls through drugs and prostitution, or suicide bombs.