Generally people flee ahead of the arrival of the fighting. Perhaps you don't have experience with this in your family. I do, since my mother's family was dispossesed in Georgia and fled ahead of Sherman to Jacksonville. We didn't wait for the fighting so we could be burned up in our home.
Also, fleeing a war zone to go to the nation of the invader is not the same as simply fleeing the war zone. It is collaberating with the enemy.
The Palestinians could hardly flee to the nation of the invader when they fled from a part of Palestine under Jordanian or Egyptian or Lebanese control to a part of those countries outside Palestine. They remained within the same sovereign territory the entire time.
Worth reading:
David Ben-Gurion declared in 1938, "after we become a strong force, as a result of the creation of a state, we shall abolish partition and expand into the whole of Palestine" In 1948, Menachem Begin said, "The partition of the Homeland is illegal. It will never be recognized. The signature of institutions and individuals of the partition agreement is invalid. It will not bind the Jewish people. Jerusalem was and will forever be our capital. Eretz Israel (the land of Israel) will be restored to the people of Israel, All of it. And forever".
http://encyclopedia.thefreedictionary.com/1947%20Partition%20plan%20for%20Palestine
I suppose you think the plantations of the south should be returned to the slaveholders?
Yes, I'd like my family's property back, or at least fair compensation. It is currently held by the US Government as Kings Bay Naval Submarine Base. We were never given anything for it or for the senseless or needless destruction of our property and possessions.
ping