The simple answer is, realistically, Palestine can't do it alone without help. Some other country will have to step up and get involved.
Currently, even the countries who don't necessarily back Israel aren't interested in helping Palestinians, including major Muslim countries in the Middle East.
It could have something to do with the history of Jordanian Civil war, which was a war between the King of Jordan and the Palestine Liberation Organization. Islamic countries like Jordan and Egypt haven't exactly been stellar friends to the people of Palestine ever since. (Whether that position is justified is up to you to decide, I am not here to argue whether it is good or bad.)
So unless things change somehow, they will likely not gain their freedom.