This is non-sense, most Arabs living in Israel can only trace there presence back to the 1900's. According to International Law they declared war on Israel in the hopes of seizing land from the Israeli's. Those Arabs who choose to renounce Israeli citizenship became refugees after having committed TREASON against the lawful nation state of their residence. The Arab nations declined to allow Israeli Arabs to return to their home nations and instead forcibly expelled their own Jewish populations even though they had committed no crime. The Maronite Christians and Druse of Lebanon opened there arms and hearts to their expatriate countrymen and are thanked by having civil war waged against them by Hizbullah. Jordan renounced its claim to the West Bank and Jerusalem's Arab sector. It is Jordan's territorial claim and casus-belli that the PLO and Hamas now claim even though sovereign territorial claims may not be ceded. That means that only Jordan has legal standing to claim sovereignty. The British mandate was divided into TWO entities by the UN: Trans-Jordan and Israel. If at any time Jordan were to press its legal rights for return of the West Bank it would be a lawful cause of war and the winner of said war would be entitled to keep the territory for as long as they could hold it.
Similarly Syria has a casus-belli to reclaim the Golan heights. Neither nation pursues its claims because they know they cannot win a military confrontation with Israel.