"The Nakba" was a result of the war begun by Arabs. Without that war, there would have been no "Nakba". Israel invited the local Arabs to participate in the new nation. Some Arabs took them up on the offer, and they and their descendents live as full Israeli citizens today. Some chose to flee because they listened to their leaders who did not have their best interests at heart. Some of those who fled returned and some became refugees. Those who chose to fight or were historically responsible for pograms were expelled. That is the Nakba in a nutshell. Blaming Israel for the "Nakba" is self-pitying ahistorical revanchism full stop. The Nakba was FAFO in action, a lesson that is apparently difficult for Palestinians to understand.