So, guess I'll kick things off around here. At the risk of getting egg on my face, I suspect this is going to stay limited. Israel has no interest in toppling Assad, because as has become increasingly evident in recent months, the armed Syrian opposition are mostly Islamists who have no liking for Israel. On the other hand, it certainly doesn't want a strong Syria either, or for Hezbollah to get more missiles. Those missiles are not going to be of any help to Assad against the rebels, but they would be a real annoyance were they to be deployed against Israel by Hezbollah. Destroying them wouldn't materially weaken Assad in his war against the rebels, while at the same time it would conveniently rid Israel of a potential security threat at a time when Assad is too weak and preoccupied with the civil war to respond effectively. I would also point out that the Israeli airstrikes, if anything, serve to increase Assad's legitimacy in Syria.