Based on everything the Israelis have been doing and saying, it does seem like Israel is going to go hard at Lebanon after this Haifa attack. That's why I said, "Bye, bye Beirut." No, I don't think it will use nuclear weapons (those will be for Damascus), but a hard non-nuclear attack can do a heck of a lot of damage.
I expect to see known Hizballa and Hamas camps hit severely. I'm not convinced Beirut will be. Perhaps only known portions containing those groups will be. I could be wrong. Perhaps we're only a few hours from finding out.