a proper treatment of the topic would require a lot more detail than i can present here right this minute, but post-captivity judaism is very obviously an iranian sky god religion that is dominantly influenced by zoroastrianism, whereas the archaeology makes it abundantly clear that the people that lived in the southern levant before the assyrian destruction event were phoenician pagans that worshipped gods like baal and tanit.

it follows that judaism (and it's christian and muslim offshoots) is an introduced indo-european religion and not an ancient semitic religion and that the fact that these resettled jews were basically persians had a lot to do with their preferential treatment in the persian empire, beyond the persian's general phil-phoenicianism, which stemmed from the persian culture's inability to build ships or engage in maritime trade, or naval warfare. the persians needed the phoenicians to fight the greeks.

what that means is that you just can't separate the jews from the lebs until cyrus and persia show up, which is really pretty late in the region's history. if your historical references to israel are from the mythical david and solomon era (of which there is no empirical support for...), then lebanon does in fact become a part of greater "hebrewistan".

but this is crazy.

what is more important is the fact that 40% of lebanon is christian, and they are facing the threat of severe persecution under fundamentalist iranian hegemony. they have worked with israel in past civil wars. they are natural allies in any serious war with hezbollah, and will likely be decisive allies. the question of political union between lebanon and israel based on the consent of the governed is realistic, and doesn't require talking about conquering lebanon, or asking who built tyre and sidon or whatever.