The problem here or the sad thing to be more specific, is that people keep hoping, asking, blaming, requesting, calling Arab countries to interfere when it's obvious that this will never happen. Never. At least this is what I know from history and from what I've seen.
In Lebanon almost 25 1973-1989 war between the Lebanese vs Syrians and Lebanese vs Palestinians and Lebanese vs Israeli..... The only times Arab countries interfered was the time they killed our men, financed too many Militias, armed young men..... from Lybia, Egypt, Saudi, Kuwait, Iraq, Iran and the list goes on.
In 2006, 33 days war vs Israel, the so supposed allies (Iran-Syria) to help were hiding under the table negotiating with the Israel and Americans. Everyone was watching, not that we needed an Arab country to help.
So what I've learned throughout all these years is that you do things on your own, no country will help even If you're Muslim just like them or Christian just like them. You free your land with your heart and hands and head, not waiting for someone or for a country to do this job because It'll never happen.
And incase they do it, doesn't mean they did it for you. Arabs should get over it because an Arab unit is never going to happen....