From The Big Arab Lie:
The Arab version of the tragic fate of Arab refugees who fled from British Mandatory Palestine during the 1948 war is unequivocally and utterly false. The Arab refugees were people who fled because of the war that the Arab states started when they rejected the UN partition plan to create two states: one for Jews and one for Arabs. While nascent Israel begged for peace and offered friendship and cooperation to its neighbors, eight Arab countries, whose populations vastly outnumbered the Jews, initiated the war with simultaneous invasions of the newly created State of Israel. Had there been no Arab invasion, not only would there have been no Arab refugees, but there would have been a state of Palestine in the West Bank and Gaza since 1948.