It's been a bad few weeks for cultural assimilation. Last month, two welfare-receiving immigrants in the United States, Dzhokhar and Tamerlan Tsarnaev, set off bombs at the Boston Marathon, killing three people and injuring hundreds. By the end of the week, they had murdered a cop and engaged in a wild shoot-out and bomb-throwing melee with the police.
Last week, a couple of ethnic Nigerians butchered a British soldier with meat cleavers in broad daylight on a bustling street in a London suburb, then boasted about the murder in video interviews with bystanders. (On the bright side, they did not claim to be princes and ask for your life savings.)
Also last week, immigrants, mostly Muslims, began rioting in peaceful Sweden — burning schools to the ground, torching cars and throwing rocks at the police. (Who among us hasn't lost his temper trying to assemble an Ikea china cabinet?)