> Terrorism is - historically and in the present - almost always a symptom of a political movement that has radicalized possibly as an outgrowth of a population under occupation or backed into a corner. > > That's why to me it is a symptom.

A symptom would be a fight for freedom. The Hamas is a symptom of religious extremism first and foremost. The PLOs terrorist period is indeed a symptom of Israels bad policies.