The Palestinians altered the demographics which caused Lebanon’s sectarian government to collapse. Lots of inter-clan feuding went along with sectarianism, causing Christians and Muslims to kill their own.
Pretty much support for Syria waxed and waned at who was getting favors from them. Just like the Israelis.
Thanks for the note, I’m always willing to listen about this complex situation though, maybe I should not care as I’m certainly in no position to make a difference. But our leaders should, it be Reagan, Bush, etc. so we don’t get in a big mess.