Thank you for an unqualified condemnation of extremist violence. 
Muslims are only now beginning to realize how dangerous extremism is to their own communities. More muslims have been killed in the ME by ISIS and the offshoots of Al Quaeda than have been killed by anyone else. Muslims are killed daily in Afghanistan by the Taliban. They work from inside by threats and intimidation to take over communities and instill hatred in children. "What British Muslims really think", a documentary by human rights worker Trevor Phillips available on YouTube shows what happens when extremist views spread unchallenged and take over the education of children, the Sharia system in the courts, and preaching in the mosques. A recent report in the "Economist" states that British counter-terrorism forces believe there are over 3,000 Muslims in Britain who hold violent, extremist views. 
To paraphrase Edmund Burke: "All that is necessary for the triumph of evil is that good muslims do nothing."