Now one might receive the mistaken impression that the Torah endorses this attitude [that nations compete against one another] whereby we should assign a greater value to our own people’s good than to the welfare of others. After all, the Torah commands the Children of Israel to conquer the land from the indigenous nations. But this is clearly unacceptable! How could God, Whose mercy extends to all His creations, oppress His own handiwork?! How could the Most High command that we remove from our hearts the well being of the entire human race for our own selfish good?! Therefore, at the time the covenant was first established with our ancestor Abraham, a divine protest was lodged: The very thought of nationalism is despicable to God, for He equates all mankind. The goal is to seek the true success of all God’s creations. True justice means that one views with equal concern the advancement of the entire human race.
Where then does the the notion of the “Chosen People” enter? The Jews were elected to work at uplifting the entire human race; to bring humanity to the goal the Almighty expects of it. Israel were set aside as a “kingdom of priests and a holy nation.” A kingdom of priests ministers to the other nations in order to morally perfect them. So the separation from the nations is itself the greatest unification, in order to benefit the human race. However, if Israel will desert the good, which is the holy Torah, then its nationhood and its territorialism are an abomination before God. It is inconceivable that for the sake of a people’s natural self-love, other nations should be displaced. All are God’s handiwork. Israel must know that no permission was granted to displace a nation for the sake of national self-aggrandizement. There is one form of justice, whether it be on the individual or collective level.Therefore, several times over, the Torah links the giving of the land to the observance of Torah. Without the raison d’etre of Torah, the setting apart of one nation, would be considered an injustice.
(From the book 'In the Desert – A Vision') Parashat Vayishlah