When God severed Israel from the other races, there is no indication that this severance was for any limited period, in fact the opposite is what the truth is. The separation was to last for an eternity. This separation is a racial expression. We might just as well say that it is racism on the part of God.
Did it say that Israel separated itself from the other nations; or did it say that the God of Israel separated them from other races? If it was God, how did He do this?
He sent the seed of Jacob to Egypt, due to a famine. There, they lived in a place in Egypt called Goshen, where they eventually became slaves to the Egyptians after Joseph had died.
In the fourth generation, Israel was delivered from slavery by Moses. He miraculously led them out of Egypt and they journeyed to the Land of Promise that God said He would give them. That land was occupied by many families consisting of giants and the Canaanites. They were bigger and stronger than the Israelites.
God told His people that the land of these Canaanites was the land that He had promised them. They would live in the homes that the Canaanites had built, but they would have to destroy the way that they worshipped. They were to destroy their altars, idols and temples and, of course, all the people who lived in the land too.
It is important to notice that the Israelites were not instructed to send missionaries to them first to see if they would believe the truth, but to totally kill each and every one of them, no matter what their age or what their gender. Why? Because it was impossible for them to hear and understand the gospel. They were genetically opposed to everything God instructed His people to do.