If muslims really want to tell that Islam is a religion of peace, then their Ulema / Maulavi / intellectuals / politicians should organise a huge rally as they did against Danish Cartoonist, Salman Rushadi, Taslima, Shahbano verdict and announce in clear terms that whatever Al Quaida / Dawood / Simi / HUJI is doing is unislamic and hence the members of these oragnisations/gangs are exterminated of Islam. And further, they should not take Allah's name for whatever crimes and violence they commit. Then only the world will get convinced that Islam is a religion of peace.