Sharing  Jerusalem as capitol of two different people is to invite more trouble. There should've never been any  Arab presence west of the Jordan River, but that's past colonial incompetence. As for today, there will be no return to the 1967 line nor will Jerusalem be divided again. Those are the hard facts on the ground. Any peace is unattainable in the present situation due to Palestinian inability at effective nation building, embracing of radicalism and total lack of democratic and civil infrastructure. So, any "peace process" is only good for a headline on a slow news day and to justify "efforts" of various international parasites.