Israel's right to self defense is meaningless in her status as an occupier. The State of Israel is the tail end of the American Empire. If you want to know what is the American Empire's contribution to international peace and stability read Oliver Stone and Peter Kuznick's recently published The Untold History of The United States.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: Israel's 'right to self-defense' - a tremendous propaganda victory