Even the Syrians aren't That Stupid, Right?

Wretchard has an interesting article about the Rafiq Hariri assassination. I have to posit that the Syrians were not so thumb-fingered as to car-bomb the guy after President Bush has said, "You're next." I'm also going to go way out on a limb (haven't been wearing my tinfoil hat lately) and say that the CIA-Mossad axis probably isn't to blame. Who's left?
Iran-Hizbollah, that's who. Hizbollah is backed into a corner. Anything that happens to the West of Iraq in the ME takes the US eye off of Iran. Also, fascist dictators aren't really the car-bombing type inside their own territory.