I think we should stop calling radical thugs terrorists. I suspect they feed off that label, especially angry young recruits looking for a home in which to vent their frustrations. The thought of being a terrorist probably gets them off.
Instead we should label them for what they are, such as a band of unbalanced, egomaniacal, brainwashed cult members and control freaks who lack the courage to play fairly with others in a balanced, civilized society (or add your own derogatory label).
Stop giving them a label they love.