The reason the world isn't concerned about Israel is because it knows what she has and it knows that she will use what she has responsibly. That should be obvious given the last 30 years. The reason the world is concerned about Iran is because it is out of control, irrational, repressive and has a belief system where death, particularly of others but even there own, is meaningless. It makes little sense to suggest that we should treat these two entities "equally".
U.S. says it killed 10 AQAP Islamist militants in four air strikes in Yemen since April 23 (Reuters)
from the article: Turkish PM: Israel is the main threat to Mideast peace