Since Iran orchestrates what goes on in Lebanon and Palestine you can speculate they would use them to open a second front against Israel. Maybe even order pre-emptive strikes to preoccupy Israel.
As for Israel taking out the scuds, those things proved remarkably hard to find in Iraq. We pretty much turned the air war in GWI over to hunting scuds and they still managed to get them set up and launched. No accuracy but if they have chem or bio on board they would serve as an effective terror weapon no matter where they landed in Israel. If that happens, Israel will take the gloves off.
I think we’re going to see a war in this area that will finally decide matters, instead of leading to other conflicts a couple of years later.
Hizbullah having Scuds is a big step in the wrong direction for peace, and a tremendous step in the directon of a real war.