I remember the riots in Los Angeles and how frightening it was to watch it on TV, never mind being right there.
After the L.A. riots, there were pundits that pointed out that life in L.A. reflects a sort of cloistered group of haves, versus the uncloistered group of have nots. Meaning, I thought, that the haves in L.A. travel to their jobs in the seclusion of their cars, never having to rub elbows with the underclass, as New Yorkers do every day on the subway. So, please do not follow any herd thinking, and believe a riot, is a riot, is a riot (a rose, is a rose, is a rose). The U.S.A. has worked hard, since the '60's riots to lessen the alienation of minorities.
Britain will learn from this event, like the U.S. learned from those '60's riots. L.A. was different than many urban centers, as I mentioned, since the haves were able to maintain a cloistered life, shielded from the underclass.
Perhaps, there will never be riots in German cities, which might just reflect the ability to do preventive social engineering?
When the Brits had a civil society, they did tend to look down their noses at others, I believe. So, I am trying very hard not to have schadenfreude, since they did shed real tears on 9/11. But, many can be annoying in their pompous culture, when times are good there, I believe.