It's not random: Hezbollah and Israel have been fighting for a while[0] and Hezbollah's mission is to eliminate the state of Israel[1]. I'm sure no member of Hezbollah is surprised that Israel would attack them.
[0] https://en.wikipedia.org/wiki/Israel%E2%80%93Hezbollah_confl...
I would dispute that but also don't see the relevance to the conflict with Hezbollah.
This is all one conflict, it does not make sense to treat this as an isolated conflict between Israel and Hezbollah. And it is dishonest [1] to portray the conflict as Israel resisting various groups that want Israel removed from the map and not mention that the Israel similarly wants Palestine removed from the map. And I am not sure how one can dispute this as the Israelis themselves say it. When the State of Israel was established, Ben-Gurion was hoping that Israel will eventually encompass all of Mandatory Palestine and today Netanyahu says in no uncertain terms that there is no room for an independent Palestinian state. And the actions in between do not paint a different picture either, whether it is the construction of settlements to further fracture the land or to support of Hamas in order to weaken the PLO.
[1] This is not necessarily an accusation of the commenter I replied to, maybe they just deemed it unnecessary to mention. I think it is worth mentioning to not create a skewed image for people unfamiliar with the conflict, that is why I wrote my comment. However reading it again I have to admit that the wording is far from perfect.
Let's mention both sides, Israel wants the State of Palestine gone.