How did God decide to the divide off parts of the earth according to nations?
This study concerns the program of the Tribulation as it relates to God’s program for the Jewish people. It will be introduced by quoting Deuteronomy 32:8-9:
When the Most High gave to the nations their inheritance, When he separated the children of men, He set the bounds of the peoples According to the number of the children of Israel. For Jehovah’s portion is his people; Jacob is the lot of his inheritance.
God has an overall prophetic program that is often subdivided into three distinct plans: first, God’s plan for the Church; secondly, His plan for the Gentile nations; and thirdly, His plan for the nation of Israel. But regardless of whether one speaks of God’s plan for Israel, the Church, or the Gentile nations, all three center around the Jewish people. Moses writes that this is true to the extent that when God in His providence laid out what would become the boundaries of various nations, He somehow reckoned into that accounting the number of Jews who would play a role in that nation’s history. This means that when God mapped out what would become the borders of the United States of America, He somehow reckoned into His accounting the number of Jews who would play a part in American history: For Jehovah’s portion is his people; Jacob is the lot of his inheritance.
In verse 8, God is referred to as the Most High. According to Genesis 14, whenever God is referred to as the Most High, He is emphasized as the possessor of the heavens and the earth. Since He is the possessor of this earth, He can subdivide this earth and give whatever portions He desires to whatever nations He chooses.
When God began His division of the earth and decided to give this part of the earth to this nation or that part of the earth to another nation, He reckoned into His entire providence the role that the prophecy. So, once again, when God determined the borders of the United States of America, He determined them on the basis of the number of Jews who would play a role in American history.
Source: Jews and the Tribulation Page 3-4.