Did you misspell the word genocide? Or is that "my job is to keep the left pro-Israel" Sanders doing it?

No, Israel Does Not Have the Right to Self-Defense In International Law Against Occupied Palestinian Territory

Occupation Law prohibits an occupying power from initiating armed force against its occupied territory. By mere virtue of the existence of military occupation, an armed attack, including one consistent with the UN Charter, has already occurred and been concluded. Therefore the right of self-defense in international law is, by definition since 1967, not available to Israel with respect to its dealings with real or perceived threats emanating from the West Bank and Gaza Strip population.