Your description of the ethnic situation in Ukraine is utterly false. Every ethnographic study for the past 150 years has shown that every oblast in Ukraine, except for Crimea, has always had a majority ethnic Ukrainian population, not Russian. This includes Donetsk and Luhansk. The ethnic Russian majority in Crimea only dates from after WW2 when Stalin deported the Tartar majority to the interior of Russia.
Published in 1879:
https://euromaidanpress.com/wp-content/uploads/2017/05/1879_nation_europe1.jpg
Published in 1914:
https://i.pinimg.com/originals/0f/09/3d/0f093d9ed319ed61b678a225cb86a69e.jpg
Published in 1949:
https://euromaidanpress.com/wp-content/uploads/2017/05/wMWjtUSAXoQ1.jpg
Published in 2001:
https://2.bp.blogspot.com/-hL85-21M0a4/VyigQss_JpI/AAAAAAAACTc/iZwo8Q8ZCIYyG8j-kdr8Hul2BTNPP0M8wCLcB/s1600/781f6031609e52f92003a7098d5fd73a.jpg
Even today, only 17% of the Ukrainian population identifies as Russian:
https://www.britannica.com/place/Ukraine/People
https://www.worldatlas.com/articles/major-ethnic-groups-of-the-ukraine.html
https://en.m.wikipedia.org/wiki/Russians_in_Ukraine
When last checked there were 6 million Russians in Ukraine in Eastern Ukraine areas.
bttt