BOSTON JIHADIST'S SOCIAL MEDIA PAGE SHOWS HE HAD INTEREST IN ISLAM

Jihad Watch has a screenshot, which shows some details of Tsarnaev's interests, which include the Religion of Peace and explosives. And Deadspin's got more (also via Jihad Watch):

Tamerlan says his girlfriend is half Portuguese, half Italian girlfriend and converted to Islam: "She's beautiful, man!"

Tamerlan demonstrates a way of walking to strengthen the ankle muscles at the Wai Kru Mixed Martial Arts center. A native of Chechnya, Tamerlan says: "In Russia, we used to train like this. Here nobody does it, I don't know why!"

Tamerlan says he doesn't drink or smoke anymore: "God said no alcohol." A muslim, he says: "There are no values anymore," and worries that "people can't control themselves."

Tamerlan says he doesn't usually take his shirt off so girls don't get bad ideas: "I'm very religious."

And here's another screenshot of Tamerlan's Youtube page, which features videos by the sheik Feiz Mohammed, who called for jihad against infidels. And even if his girlfriend converted to Islam, that did not keep him from assaulting her in 2009.

So now we know that jihad did have a connection to this repulsive act of barbarism. Even the UK Guardian is willing to acknowledge this.