Is this the consequence of the never ending military actions -the hitting with the hammer instead of any kind of negotiations or even any kind of trying to get a contact with "Hamas" . It is only so true, that when pushed to the corner,you become more lunatic and more violent (terrorist)-and will attack some day. Like a dog which have been beaten by its owner.
Yemeni ISIS affiliate claims responsibility for Sanaa mosque bombing (Reuters)
from the article: 'Hamas weapons capability increased four-fold over last five years'