Internal Israeli problem. Some internal group not previously on the radar there or whose threats had not been taken particularly seriously.

There are growing numbers of IDF and intelligence service "defectors in place" who pretty openly publish their own opposition to Israeli and US policy in their own blogs and not-so-underground videos. Growing numbers are sympathetic to the Palestinians and you can see a lot of Palestinian fighters now sporting weapons bought/smuggled/provided by Israeli sympathizers.

Mossad operatives? Maybe, but we would be talking about the lower grade less trusted and less trained breed. It could well have just been a symbolic "warning" attack that all is not well in the promised land, even among the chosen people. Don't forget that it was internal stuff in Israel that resulted in Rabin's assassination, and Rabin was a close friend of the Clintons.

Apparently we were talking small group much more concerned with force preservation than a suicide run on the hit. Who knows if it may have just been another one of the local groups hitting the convoy not even knowing Clinton was there, and taking potshots at the convoy because they just figured it looked like someone important enough to take potshots at.