The terrosist attacks are caused by political, cultural and economic factors, I don't think technology has an important role to play in an eventual solution...
In the grand scheme of things this is possibly the correct answer. However, what technology can do is bring some meaning to more peoples life. One reason people do things like those which happened in Paris is due to the fact that these people are not integrated into a friendly, peaceful society. Thus they feel a void and need to fill it with something that gives them a sense of power and belonging. Technology can be…
I don't see first option as a viable one, simply because there's currently 1.7 billion Muslims in the world (most of them doesn't support the radicals, but I'm guessing that could change very quickly if their innocent family members get killed during the "levelling of the ground"). It would lead to WWIII.
I think the positive route, along with some smart interventions (i.e. not having borders open to any and all refugees which want to enter Europe, but rather absorbing them at a manageable rate), is the way to go.