1. Jews didn't grasp absolutely another's earth (as Anglo-Saxons in North America and Australia, Spaniards in South America or Russian in Siberia ), and returned the/disputable earth. Jews and the Jewish states were in "Palestina" many centuries prior to the Arab occupation in the 7th century AD. Then Jews lost the earth and long couldn't return it - partly because of the non-Jewish counteraction and threats, partly because of the religious prejudices. But always were going to return here. An obligatory toast for the Jewish New Year: "BaShana habaa - be-Yerushalaym" ("next year - in Jerusalem".) Rabbis stored and supplemented laws for future Jewish state in Erets Israel("Palestina").
2. Why descendants of Aryan colonialists in America or Australia - dare to condemn Zionist "invaders"? Same double impudence