There is a scenario that says that talking with Israel is a waste of time, and in fact counter productive, unless the US finally pushes Israel to a reasonable deal. So pushing diplomatically through the UN for their own state in defined borders is a fair strategy. What in my opinion will be critical is for rockets and other non provoked violence against Israel to stop. (as it largely has done) With no violence, most of the western world will see Palestinian reconciliation as an important and positive step, and wish to reinforce it with progress towards a normal self governing state, in defined borders.
Russia calls for international cooperation to fight ISIS (Reuters)