And presumably the Lebanese would be more welcoming of foreigners, just so long as they're some third party? Not likely. The whole idea of putting "peackeepers" between two forces who want to knock the hell out of each other, Israel and Hezbollah, is absurd. Neither side would grant them any jurisdiction over the border areas, and they would at best be caught in the crossfire.
For my money, I think Israel will be fine as long as they confine their activites to Lebanon. But if they go after Syria, the **** will well and truly hit the fan, with not only Syria and Iran getting involved but also drawing a much sharper response from the Arab world. It's also funny how, just a year ago, the West was head over heels in love with the "Cedar Revolutionaries", those fresh-faced young democrats, all Western and secular and loveable, and now that bombs are falling on them, its all like "Huh? Lebanon? Oooh, you mean Hezbollah, right? Yeah, bomb them ****ers."