Virtually every nation has holidays marking significant historical events such as its founding date or its independence from foreign domination. The Passover celebration commemorates Israel's liberation from Egyptian bondage and the Exodus toward a national homeland. It also is a memorial of a covenant relationship established between God and the people of Israel. National pride in a country can unify a people in times of economic adversity or acts of aggression by a neighbor country. National pride can also be exploited by aggressive leadership.
All nations are families which have grown large enough to possess and hold a territory.
Ultimately, it is God who separated the nations into their respective territories. And I will make My covenant between Me and thee, and will multiply thee exceedingly. And I will make thee exceedingly fruitful, and I will make nations of thee, and kings shall come out of thee. And I will establish My covenant between Me and thee and thy seed after thee in their generations for an everlasting covenant to be a God unto thee, and to they seed after thee.