Looking for root causes, James Taranto quotes from an article on the first Muslim Miss England:

"The first Muslim to be crowned Miss England has warned that stereotyping members of her community is leading some towards extremism," reports London's Daily Mail:

Hammasa Kohistani made history last year when she was chosen to represent England in the Miss World pageant. . . .

She said: "The attitude towards Muslims has got worse over the year. Also the Muslims' attitude to British people has got worse.

"Even moderate Muslims are turning to terrorism to prove themselves. They think they might as well support it because they are stereotyped anyway. It will take a long time for communities to start mixing in more. . . ."

So let's see if we follow this argument. According to Kohistani, Muslims are so thin-skinned and so violent that they respond to prejudice with terrorism.

Um, isn't that an invidious stereotype?

[A]lthough Salafi Muslims are more isolated now, some scholars say their approach to Islam could become more appealing in response to increasingly negative views of Muslims among Americans and vitriolic Islam-bashing on the Internet.

“Salafi teachings begin to be more attractive to more Muslims as a defensive response,” said Peter Mandaville, an assistant professor in George Mason University’s Public and International Affairs Department. “In the face of this new global war on Islam, they are saying, we will hold fast and emphasize anew the fundamental tenets of our faith.”

Heh--as another prominent warblogger is apt to say in-between sips of his favorite drink.

So what were the root causes, five years ago, right around this time? Oh right: sharks! (With or without frickin' laser beams.)