To destroy them you have to find them first. After that you have to destroy them. Then you have to destroy those who will replace them etc etc. The problem is terror is a symptom of a situation. To try to cure a sickness by attacking symptoms is naive and also impossible. The only solution is to change the situation who produced the symptom. For this you need intelligent leaders , we seem to lack them.
Yemen's Houthi rebels commit to peace plan in letter to UN chief, BBC reports (Haaretz)
from the article: Abbas' only chance