Actually you're describing what Brits did in Mandatory Palestine , intentionally sending European colonists to replace the Arab population and were successful in achieving this in 1948, Russians didn't ethnically cleanse Latvians like what happened with palestinians
https://en.wikipedia.org/wiki/Balfour_Declaration
Balfour Declaration
His Majesty's government view with favour the establishment in Palestine of a national home for the Jewish people, and will use their best endeavours to facilitate the achievement of this object,