Zvi is NOT correct on this. I don't think there is a difference between Iran and Syria on the International Tribunal. Hezbollah is NOT acting against Syria's wishes by resigning from the government. Berry's and Aoun's ministers are also Syria's allies and they have resigned as well. This is an escalation by Hezbollah and Syria because they both have failed in bringing down the international court that's investigating and will be prosecuting the cases of assassinations that took place since 2005. I think Syria and Hezbollah (and Iran by extension) cooperated in such assassinations (murders is a better word).
Justice Ministry: Information examined by AG about Gal Hirsch didn't come from police (Haaretz)
from the article: Hezbollah exit from Lebanon government carefully planned