Remigration

there was a Return of the Jews under Cyrus, which continued in Partial Remigrations for some time after.

Source: wiktionary

While the concept of remigration has long existed in academia, its hijacking by the far right on social media appears to have begun about a decade ago when French adherents to identitarianism, an ethno-nationalist movement, organised what they described as the inaugural meeting in Paris on remigration.

Source: wiktionary