Sorry, although you seem to recognize the eventual result (Damascus is dust), you don't see the possibility for Syria acting in an unwise manner, primarily because it is Iran that's the big dog.
I'm not precluding a foolish mistep by Syria at all. I'm just pointing out the current situation and statments that suggest Israel is not looking at Syria right now but is in fact looking to make some use of the fact that Iran has provided advanced missile systems to its foreign based army in south Lebanon.
Where it goes is still an open question. But I think Israel wishes to decouple the threat as much as possible and marshall international recrimination toward Iran for orchestrating, funding and supplying this type of advanced missile technology to attack civilians in Israel.