We did unite until Camp David where the tides of things skewed dramatically and called for a different course of action. However since then Palestinian cause were over shadowed by Iran and Iraq till then and so we need to clean up the mistakes of the past 40 years and get all those guys out who are causing the schism between our countries and caused us to be weak.
Just imagine with Assad out, Syria, KSA, Egypt, Libya, Algeria, Morocco, Jordan, Tunis, Lebanon, Turkey and Inshallah Iraq as well will all be united again. Then we can build this unity to great heights in time and become a truly powerful nation.
In time we even erase the borders as relations will work more and more and become more and more closer to each other our people already love and respect one another but this will take unity to a whole great level. THAT my friend is Israel's nightmare. Not Assad's fall but Arab and Islamic unity.