Yep Stalin murdered a lot of Ukrainians but he was not a Russian. He was a Georgian.
And what did the Russian Bolshevik intelligencia who supported Stalin think of such genocide? Did they not view it as retribution for the events of 1918 - 1921? And what might have been the precursors of such genocide? Earlier pogroms? Persecution of non Russian nationalities in the old Empire? Just some food for thought ...