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Hezbollah is also democratically elected in Lebanon, they do not rule by force.
And is Hezbollah's democracy any less stable then Israel's, where Lieberman and his horrid ideas are keeping Netanyahu in power.
I know you intentionally ignore news you don't like but here's a quick review.
A few weeks ago, armed Hezbollah operatives prevented the actual government from arresting someone who was charged under Lebanon's laws.
You may have missed over a year of Hezbollah holding a strike to get powers that they hadn't been elected for. That confrontation ended in a week or two of gun fights between supporters of Hezbollah and the government coalition.
You also may have missed that Hezbollah has refused to turn over their weapons to the Lebanese military and have refused to have their forces merged with the LAF.
One last thing you must have also missed was the massive arms build up that Hezbollah - a non-governmental entity - has continued.
Your post also seems to pretend that Hezbollah is the elected government. They are not. They have been elected to enough seats that their coalition is essentially the opposition party. They do not rule Lebanon except through the fear that their willingness to use force provides.
As for you questioning whether Hezbollah makes Lebanon more unstable than Israel, I can't remember the last time that Israeli political parties settled their disagreements on the streets using automatic weapons and RPGs. Lebanon is so unstable right now that even though the UN tribunal into the political assassinations have let it be know that high ranking Hezbollah members are to blame they refuse to make an official statement because of the violence that will occur.
I would say without a shadow of a doubt to have the Iranian leader come to Lebanon and openly pledge support for a well armed political party that Iran had created in the first place and one that has often used those weapons against other Lebanese means he isn't afraid to announce his goal of Iranian Shiite control over Lebanon.
I would suggest you take the time to read some Lebanese newspapers before trying to use this as yet another attack on Israel because the Lebanese papers I read have articles that quite regularly comment on the increasing political instability and often compare current events to the time at the start of their civil war.