Of course we can look at just the thread title, namely " Arabs and Jews" refuse to become enemies and have giant reasons to hope. And in fact, in the 1870 up to 1948 period, we can find countless examples of mixed communities of Jews, Arabs, and Palestinians living in harmony for the mutual benefit of all. And at the same time we can find Jew on Arab violence and Arabs on Jews violence.
So why can't we have fair sharing of the mid-east among Arabs, Jews, and Palestinians today? To some extent, what prevents that is the big step of forming a Palestinians state that would defuse much of the hatreds. But beyond that, the entire mid-east shares a common problem, namely lack of water. And there Israel high tech in building desalinization plants and dams in Arab Territory could do much to develop the entire region. The Egyptian dams on the Nile does much to help Egypt now and there is little to spare, but in Lebanon, Syria, and Turkey there is much that could be done to tap hydrological resources. But in terms of desalination plants, its Iran that has the natural gas and perhaps the soon to be tapped ability to generate the nuclear energy to run those desalinization plants. And we have not even touched the idea of harvesting water from icebergs, something the Arabs have the waterways to do and Israel does not.
A rising tide can lift all boats and continued hostility can only sink all boats.
Call me an optimist if you will, but I ask why not?