This post has more on the Hezballah tactics. Here is an excerpt on the 2005 action:

The IDF had intelligence information on Hezbollah plans to deploy specialized anti-tank teams in order to delay the advance of IDF ground forces. The special focus Hezbollah gave to anti-tank weapons as part of their doctrine was revealed during the raid on the border village of Ghajar in November 2005.

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During the battle at Ghajar, which is inside Israeli territory and has an Alawite population, Hezbollah fighters fired more than 300 anti-tank rockets of different types, including the new RPG-29, which targetted various armored vehicles and two Merkava Mark-2 tanks. One of the two tanks had the necessary armor to deflect the missiles, but the other took a hit to the body.

Following the battle at Ghajar, Israeli inquiries that Russia was transferring modern anti-tank weapons to Syria and on to Hezbollah were received with anger. The Russians demanded proof that this had been done.

Contrary to common practice, Israel transferred to Russia the tail-end of a rocket for analysis. The Russian response was that in the absence of a serial number they were hard pressed to identify it as part of a load delivered to Syria.

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The RPG-29's are described as having a tandem warhead that apparently can penetrate the heavy armor of the Israeli tanks. The story does indicate that the majority of infrantry casualties have also been from the anti tank weapons.