Why were the "invaders and occupiers" in Lebanon in the first place. How did Hezbollah become established? When you have answered those questions, you will appreciate that Hezbollah is now purely a pawn in the strategy of Iran and does not represent the interests of Lebanon or her people's. Or indeed anything to do with the Palastinians.
Palestinians, IDF clash in Jalazone after funeral of teen killed by IDF on Friday (Haaretz)
from the article: Nasrallah: Hezbollah able to strike anywhere in Israel