There, at this point, isn't going to be a one state solution, or a two state solution. Just a winner and a loser.
There are now far too many parties who ultimately want the Palestinians out of the region. Whether for religious, economic, land, political, petroleum, revenge, or several others reasons out there. There only "friends" are using them and would see them all dead it if helped their cause.
It isn't going to happen in my lifetime probably, but over the next few decades they will continue to encroach settlements, more "wars" will happen, rinse and repeat. And they will be doing so with the secret blessings of the Sunni Regional powers, including Egypt, all of the West powers, and the rest paying lip service support but essentially meaningless UN bleating.
Unless a Ghandi-esque figure shows up I don't see any other outcome.