I don't know if you're trolling but this is laughable. White settlers came to my continent and forcefully settled, they used their superior tech to subdue natives. Aren't the Ukrainians the natives in those lands? If Ukrainians moved to Russia and tried to colonize Russia and Russia fought back then your point would be valid. This is why reasonable people cheer the Soviet Union fighting and defeating the Nazis.
When the Europeans decided to carve up the continent, they created a bunch of artificial colonial constructs that put many ethnic groups together that had no business being together and used artificial boundaries to separate brothers. In South West Nigeria, you have the Yoruba who have far more in common with their Yoruba brothers (and other similar groups) in neighboring Benin Republic than they do with Igbos, who are supposed to be their countrymen. Igbos have more in common with groups in southwest Cameroon and Equatorial Guinea than they do with Hausa, Fulani, Tiv, Urhobo, etc who they are supposed to share a country with. Benin Yorubas move to Nigeria and settle and Nigerian Yorubas do the same willingly. However, if the current President of Nigeria, Bola Tinubu, a Yoruba man, wakes up tomorrow and decides to roll tanks into Benin (which they could easily do as Nigeria has, by far, the most powerful military in West Africa) to unite Yorubas under the same country, the Beninese Yoruba would fight like hell and rightfully so.
Two groups may be historically linked but they've lived long enough in two different countries that you've got to be mad to want to forcefully subdue people who have enjoyed sovereignty for a long period of time. Russia needs to read the writing on the wall, focus on building itself and building good relations with its neighbors.