Mass migration is probably the single most effective tactic in the push toward globalism. It dilutes a nation's identity and fractures its society into different ethnic factions. The final world kingdom that exists when Jesus returns is described as a multi-national, multi-ethnic conglomerate.
And in that you saw the feet and toes, partly of potter's clay and partly of iron, it will be a divided kingdom; but it will have within it some of the toughness of iron, since you saw the iron mixed with common clay. And just as the toes of the feet were partly of iron and partly of pottery, so some of the kingdom will be strong, and part of it will be fragile. In that you saw the iron mixed with common clay, they will combine with one another in their descendants; but they will not adhere to one another, just as iron does not combine with pottery. Daniel 2:41-43It's natural for people to want to associate with others that are like themselves. So, when large groups of people are moved into different cultures the result is balkanization, not assimilation. The globalists know this and promote mass migration for the purpose of fracturing and weakening the nations. Their senseless wars and wrecked economies create the large number of refugees necessary to dilute the stronger nations. They lie about the effects of mass migration by spreading the propaganda that diversity is a strength and that cheap labor and open borders is beneficial to the economy, which isn't true.
The man of sin will have authority over all the nations. Today's mass migration is an unnatural movement of people caused by the globalists in order to weaken the strong nations. Weak, dependent nations are what the globalists seek. Mass migration is a means to that end.