Are you aware that all the communities and towns on the northern border in Israel have been evacuated from civillian populations due to missile attacks and fear of a Hamas style raid?
Soldiers are dying from Hezbollah firing missiles across the border.
Israel is bombing the Hezbollah supply lines.
The LAST thing Israel wants right now is another front opening up.
Iran, the puppet master, is however more than happy to fight until the last Arab.
And whatever the complex history between Palestinians and Israelis, Israel does not occupy any Lebanese lands, there is no dispute to fight over. This is Hezbollah spoiling for a fight (they give not a shit about Palestinians, they murdered ebough of them in Syria to show that) driven by Iran, their paymaster.