If you've been paying attention to Israel's bombardment of Gaza, you know that Israel hasn't earned any significant military wins against the Palestinian resistance. It's honestly been humiliating for them, on top of the humiliation of Oct 7th. Israel has been overcompensating by obliterating Gazan lineages and planting Israeli flags into flattened blocks, but the IOF keeps getting beaten by the guerilla warfare of the resistance.
Now, likely in an attempt to achieve SOME kind of military win, Israel has allegedly bombed a top Hamas leader in Beirut. Beirut is the capital of Lebanon, located in central Lebanon. This is a MAJOR escalation, both territorially and also symbolically.
Note that the entire time Israel has been genociding Palestinians in Gaza and the West Bank, the zionist entity has also been bombarding southern Lebanon, killing civilians, journalists, and attacking medical centers there, to which Hezbollah has responded, but in a restrained fashion. That restraint will likely ebb considerably now.