The info gleaned from an earlier IAF research sortie over to Greece's Russian high-tech air-defense system and other devastating Israeli electronic countermeasures that could be launched before and after the aerial onslaught to disrupt Iranian communications, will be put to good use if it comes down to that. The stakes are very high still as unknowns exist about Russia's efforts to troubleshoot the manner in which Israel overcame Syria's radar and air-defense system and also if there's anything to the earlier hijacking of the Russian ship that may have been carrying S-300 parts to Iran, and any possible Israeli involvement in that. Israel counts carefully the repercussions of any such moves and plans extensively for all scenarios, but they will soberly assess the threat level and execute their most viable option if Iran's tyrannical rulers don't back down from their tenacious, applied aggression against the existence of the Jewish State.
Ya'alon okays administrative detention of Jewish extremist suspected in church arson (Haaretz)
from the article: Russia to supply Iran with S-300 defense systems