The notion that an attack will make Iranians rally behind the Mullas is, as we say it in Hindi, "kaam na karne ke bahane" (excuse to avoid doing the obvious right!) I think the Iranians will hate their government even more for bringing home "another defeat", "another disgrace", that too from a country that never fired a bullet at Iran all these years. You can also drop some 1 million DVD's explaining your point to the persians.
Monitor: Airstrikes hit Islamic State stronghold in Syria, killing at least 13 (Reuters)
from the article: The message is clear: Israel must not strike Iran