The world is fed up to the back teeth with terrorism carried out using Islam as an excuse. I am no fan of religion but these terrorists are neither. Reference was made to Mossad and it's hit squads particularly after Munich where not one of the planners survived. That is what is required here. Cut off the head and the money, starve the animal that way.
Except you can't kill an idea. Many terrorists are devout Muslims (e.g. Wahhabism) and their interpretation of the Quran is unlikely to change. Technology only makes it worse as now for little money they can buy a paraglider, drones etc and do a lot of damage.