It won't; a lot of people are radicalising just because of the 'war on terror'. As I said in another comment, what would you do if your family was bombed in a drone strike?
>>Cthulh+(OP)
ISIS has a very fundamentalist view of the end of the world from their reading of the Koran, and are trying to hasten the "final battle". This belief was not "caused" by the war on terror or frustration with the west, though it does align with what they expect to happen.
>>DGAP+72
I think the point is that drone strikes that kill innocent victims can be a source of radicalization. Ignoring that aspect of our foreign policy would be idiocy.
>>Cthulh+(OP)
Even if I was a homicidal maniac, I doubt I'd mass-murder French civilians.
That's what confuses me the most about these attacks. Many people have legitimate grievances against NATO forces, but how does that lead to shooting random Parisians? It's so wasteful and counterproductive.