The basic premise is if you attack your neighbor you may lose and there are other opinions which support the claim that the Arabs were not widely expelled.
"However, historian Benny Morris states that most of Palestine's 700,000 "refugees" fled because of the "flail of war" and expected to return home shortly after a successful Arab invasion. He documents how all around Palestine, Arab leaders advised the evacuation of entire communities as happened in Haifa, 1948.[83] Morris considers the displacement the result of a national conflict initiated by the Arabs themselves.[83]
(Efraim) Karsh notes that the Palestinians were themselves the aggressors in the 1948-49 war who attempted to "cleanse" a neighboring ethnic community. Had the United Nations resolution of November 29, 1947, which called for two states in Palestine, not been subverted by force by the Arab world, there would have been no refugee problem in the first place. He reports of large numbers of Palestinian refugees leaving even before the outbreak of the 1948 war because of disillusionment and economic privation. The British High Commissioner for Palestine spoke of the "collapsing Arab morale in Palestine" that he partially attributed to the "increasing tendency of those who should be leading them to leave the country" and the considerable evacuations of the Arab effendi class. Huge numbers of Palestinians were also expelled by their leadership to prevent them from becoming Israeli citizens and in Haifa and Tiberias, tens of thousands of Arabs were forcibly evacuated on the instructions of the Arab Higher Committee.[84]
Israeli