That´s debatable...the territory now called Israel was "given" away by countries that had no real right to give the country away.
Hard feelings still exist among Palestinians for the theft of their land, and it´s very understandable.
The jews/Israelis never misses an opportunity to remind the world of the wrong-doings against them, so why should the Palestinians just let their land go without a fight?
Palestinians were forced away from land they had owned and used for centuries!!