Israel is not threatened by a Russia-Syria-Iraq-Iran-hezbollah axis?? Are you serious?
Absent the historical US Commitment to Israel (they don't trust or believe Obama), I suspect Israel, at least, accepts Russia's imposition of rational, state actors.
Certainly a Syrian State with full, unquestioned control of their territory is in Israel's interests.
Israel has little influence over what happens in Iraq, and less interest.
I suspect they intend to deal with Iran via other means.
Know this: If Israel decides they need to expel Russia from Syria, they could do so easily. They have 400 combat aircraft, excellent missiles, over 1,000 tanks and another 1,000 Self Propelled Artillery.
If we see Russia starting to deploy numbers that are a direct threat to Israel, I will conceded and adopt your position.
But, as it stands now, Israel could expel them at will.