While unification sounds like a good Idea, but as always, I'll go with religion, and the Mahdi will unite the MidEast. Nowadays most of the leaders are either dictators, incompetent, or both. And we don't have many leaders in the civilian population b/c those governments would find them to be a threat to their own rule. The situation is just like that in Syria. We don't have anyone that has any experience being a leader besides the dictator and his thugs. Anyways, the hadith says that will happen, but after that, crazy stuff will start happening such as a giant war (probably what we would call "World War 3"), and I'm not being crazy here, there are ahadith that state that Muslims and Christians will unite against Romans (quick history lesson, when the Roman Empire split into East and West, the Western portion fell quickly. When the Byzantine (eastern) portion fell, their leaders fled to the Holy Roman Empire. When that fell, those leaders fled to the Russian Empire. You with me here?). But after that, Muslims and Christians will fight each other. And then the Dajjal. Anyways, back to politics. Is reunification possible? Yes. Will it happen? Probably not under this current leadership/situation.