Lebanon is complicated, the Lebanese went through a brutal civil war between 1975 and 1990 where over 150'000 Lebanese were killed. There are unhealed wounds still felt today.
Lebanon has also been targeted by Israel since the 1950s with the specific aim to stir up sectarian violence as detailed in the diaries of Moshe Sharett, Israel's first foreign minister and prime minister from 1953 to 1955:
https://msuweb.montclair.edu/~furrg/essays/rokach.html#CHAPTER%205%20%20Let%20Us%20Create%20A%20Maronite%20State%20in%20Lebanon
" The February 27, 1954 meeting among Ben Gurion, Sharett, Lavon and Dayan has already been mentioned in connection with Israel's invasion plans of Egypt and Syria. In that same meeting a concrete proposal was outlined to disrupt Israel's most peaceful neighbor at that time, Lebanon. In this case, Israel's hegemonic ambitions did not even pretend to wear the phony fig leaf of security or defense.
Then he [Ben Gurion] passed on to another issue. This is the time, he said, to push Lebanon, that is, the Maronites in that country, to proclaim a Christian State. I said that this was nonsense. The Maronites are divided. The partisans of Christian separatism are weak and will dare do nothing. A Christian Lebanon would mean their giving up Tyre, Tripoli, the Beka'a. There is no force that could bring Lebanon back to its pre-World War I dimensions, and all the more so because in that case it would lose its economic raison-d'etre. Ben Gurion reacted furiously. He began to enumerate the historical justification for a restricted Christian Lebanon. If such a development were to take place, the Christian Powers would not dare oppose it. I claimed that there was no factor ready to create such a situation, and that if we were to push and encourage it on our own we would get ourselves into an adventure that will place shame on us. Here came a wave of insults regarding my lack of daring and my narrow-mindedness. We ought to send envoys and spend money.
.........It is clear that Lebanon is the weakest link in the Arab League. The other minorities in the Arab States are all Muslim, except for the Copts........
........Not so the Christians in Lebanon. They are a majority in the historical Lebanon and this majority has a tradition and a culture different from those of the other components of the League. Also within the wider borders (this was the worst mistake made by France when it extended the borders of Lebanon), the Muslims are not free to do as they wish, even if they are a majority there (and I don't know if they are, indeed, a majority) for fear of the Christians, The creation of a Christian State is therefore a natural act; it has historical roots and it will find support in wide circles in the Christian world, both Catholic and Protestant. In normal times this would be almost impossible. First and foremost because of the lack of initiative and courage of the Christians. But at times of confusion, or revolution or civil war, things take on another aspect, and even the weak declares himself to be a hero. Perhaps (there is never any certainty in politics) now is the time to bring about the creation of a Christian State in our neighborhood. Without our initiative and our vigorous aid this will not be done."
The division and unwanted interference eventually led to the Sabra and Shatila massacre in 1982:
[Trigger Warning - On 16, 17, and 18 September 1982, between 1,300 and 3,500 civilians were killed by the Lebanese Forces, one of Lebanon’s most powerful Christian militias, in the West Beirut neighbourhood of Sabra. Targeting Palestinians in the Shatila refugee camp and their Lebanese Shia neighbours, the Lebanese Forces were found to have been supported by the Israel Defense Forces (IDF) surrounding Sabra. Two separate commissions, the independent MacBride Commission and the Israeli Knesset's Kahan Commission, found the IDF to be responsible for the events. MacBride held the IDF directly responsible as the occupying power over the area, while the Kahan Commission blamed the IDF indirectly for their failure to intervene once they had received reports of the killings. ]