We know what happens with peaceful protests, elections, and foreign interference (and more foreign interference), so how can Palestine gain it’s freedom? Any positive ideas are welcome, because this situation is already a humanitarian crisis and is looking bleaker by the day.
Historical references are also valuable in this discussion, like slave revolts or the Warsaw Ghetto Uprising, although hopefully in the case of Palestine a peaceful and successful outcome can be achieved, as opposed to some of the historical events above.
Hamas exists because the PLO was gaining too much political power for Israel to keep stonewalling them; Hamas was funded by far-right Israeli politicians specifically to prevent the PLO from doing all of what you describe.