Is this the start of the Northern War?
Suppression of Enemy Air Defenses is normally the first phase in a war.
Syria could long be deterred by its vulnerability to Israeli counter strikes - Damascus is only minutes away.
Iran likely feels insulated by its distance. The organizations and plans that Iran has been building for decades targeted against Israel have their own momentum - it would be hard for Iran to turn them away from attacking Israel, even if they wanted. It would be hard internally for Iran to even want to avoid war - their domestic politics has long punished such opinion as taboo.
Iran and Hizbollah are on a train they can’t stop - they will have to be stopped.
There are people out there expressing opinions similar to yours except they say its time for Israel to be smacked down and they hope Iran, Syria, the Russian etc. do it.
They claim the downing of the F-16 and what they believe is damage done to 3 other F-15’s in the IAF today is proof the Israelis are vulnerable to Russian organized integrated air defenses in Syria.