This came at me from one of the forum I frequent. It perfectly summarises the terrorist as I know him. This is what seems to be missed when "civilised" beings meet to discuss what we need to do to protect ourselves from such single-mindedness. Mere adaptions of our comfy, fuzzy, laws will not deter the believer.
Somewhere a True Believer is training to kill you. He is training with minimalfood or water, in austere conditions, training day and night. The only thing clean on him is his weapon and he made his web gear. He doesn't worry about what
workout to do - his ruck weighs what it weighs, his runs end when the enemy stops chasing him. This True Believer is not concerned about 'how hard it is;' he knows either he wins or dies. He doesn't go home at 17:00, he is home. He knows only The Cause.
Print it out and pin it up somewhere. Make sure you know it word perfect and understand what it is that the non-fundamentalist faces.