Dont be carried away and judge Islam by the current political turmoil...what ever big terrorism which you are saying pales into insignificance if you go back a little in history. Millions and Millions were killed in the world war between Buddhist Japan and allied forces.. Shall we prosecute Buddha for this?? 40 people died 4 years back in UK,3000 died in US( what about the hundred of thousands killed in Vietnam and Lorean wars??).do they even compare with some 10s of millions of people killed just few decaded ago..? Why go that far in time and that far in place..In our own india,for all the rioting in India Muslims didint retaliate the way Sikhs avenged themselves after the delhi massacre