Problem is that each individual terrorist has a family and friends and represents the mindset of many others. Kill one and a dozen spring up to take his place. imo

Better to address the underlying reasons and not further exacerabate them. That includes getting the hell out of their country and leaving them alone to decide what kind of future they want.

If a country then goes into a civil war or pursues genocide, THEN is when the international community has to intervene. Emphasis on 'community'.