It is a policy used by dictators over the centuries: settling outsiders in areas where one ethnic group has a clear majority.
The Iraqi dictator Saddam Hussein did it, and so did his neighbour Hafez
al-Assad in Syria. And now the Turkish president Erdogan has decided to
use the tool. And all employed it against their Kurdish minorities.
During his rule, Saddam offered Arabs from the south of Iraq all kinds
of incentives to move to the disputed oil city of Kirkuk that the Kurds
consider as their Jerusalem.
The prospect of a good job, with a good salary and a house attracted
many, while at the same time Kurds were evicted from the city.
Assad also was able to send thousands from his Arab population to the
Kurdish region, like Saddam did next door, in order to further
marginalize the Kurds through Arabization.