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Historical references are also valuable in this discussion, like slave revolts or the Warsaw Ghetto Uprising, although hopefully in the case of Palestine a peaceful and successful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.
Realistically? Unless the international community (or the Muslim world) have a change of heart, the Hamas way of "get Israel to broadcast their atrocities to the world as loudly as possible) seems to be the best bet currently. A direct war of liberation is impossible because of the blockade, but at this rate the international community might actually give Israel the Apartheid treatment in two or three decades.