I think Syria learned its lesson from the Six Day and Yom Kippur Wars. They aren't going to attack Israel. They would probably try to fight similarly to how Hezbollah has, hitting cities with rockets and missles, targeting tanks with ATGMs and trying to draw the Israelis in and then harass and cut them off. Of course, Syria has tanks, planes and other nice toys that Hezbollah doesn't have so they would be able to hit Israel with more firepower. But if Israel wanted to bomb the Syrians back to the Abbasid Caliphate, they could. And if they wanted to punch through and take Damascus, they could. I doubt that Israel would try to force reigme change though, as any reigme that replaced the Assads would be Islamic and more hostile to Israel, not pro-western.