All killing of innocent people is unjustifiable. Your attempt to justify Israels policies toward the Palestinians on the grounds that the Isrealis are not the only people killing innocent civilians in the world is ludicrous. No matter what any other atrocities are committed by other people anywhere on the planet, they do not justify the killing of non combatants. So, you need to take your own advice, and realize that the Israelis and Palestinians are both unjustified in killing each other.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: A still-stained UN