Under the UN charter they gave up those rights if they chose violence and open conflict over Peace..............
They had laid out a Map for a Palestinian State.............but they chose War.............under the Mandate the UN or Israel had no obligation to recognize it if they chose War.
They didn't give up their rights, their "rights" were taken away.
And they didn't "choose" war, they did what you and I would do if our home was invaded by a foreign force. Everyone in the world has the right to defend themselves.