This has been going on for five days. And it's all the Swedes' fault, at least according to the US mainstream news pablum:
IHT (NY Times): Riots Dent Image of Sweden’s Classless Social Model -- No dents on the image of multiculturalism, of course.
LA Times: Nights of rioting test Sweden's reputation for tolerance -- Somehow, if you riot and set fires, it's your benefactors who have their reputation tested, not you.
Atlantic Wire: Sweden's Inexplicable Riots, Explained -- Name-calling, income disparity, unemployment -- everything except the rioters themselves -- are assigned the blame.
Executive summary: Rescue Third-World refugees, lavish social aid on them, and, when they start to riot and burn your country, search your souls for "racism"... you intolerant bigot.