Southern Lebanon is 30-34% Catholic and Christian. I see reports that many Christians are choosing to stay despite the Lebanese army withdrawing. The commander in chief of the Lebanese army is Catholic in the Roman rite
Meh, give it six months and Israel will, probably, annex southern Lebanon, probably use some Druze to help them and either call it a buffer of join it to Israel like the Golan Heights. If you are a security threat to Israel the Jews will annex your land, and if you want to know who is a security threat to Israel here's a map.