I shouldn't even let the Daily Mail bother me anymore.
Figures from the Office for National Statistics show that, as of 2010, London's foreign-born population is 2,650,000 (33 per cent), up from 1,630,000 in 1997. (From Wikipedia).
1 in 7 rioters were foreign born, that's 14%.
So, actually foreigners were doing LESS rioting as a proportion of the population that the British-born. WE SHOULD BE APPLAUDED, NOT DERIDED.