Yeah, exactly. Those who didn’t consider themselves Russians have been purged long ago, forcibly deported and driven out from their lands since the early Soviet times.
Tatars and Ukrainians have been targets of ethnic cleansing since a long time in Crimea, and therefore Russia should be granted the land as a prize. Just like with Koenigsberg Kaliningrad, it’s very easy, if you kill and deport everyone in an area, then that area is yours.