I think I could answer that rather easily.
Most of Ukrainians are Slavs, they also were involved with Russia economically and culturally for many decades and even centuries, until collapse of the USSR. Many Ukrainians speak Russian in every day life.
My mother was born in Central part of Ukraine, West from Kiev and has lived there for 20 years, so she is Ukrainian by blood but Russian by citizenship.
My uncle holds dual citizenship (Russian/Ukrainian).
I have two cousins in Crimea.
To me Ukrainians are no different than my mother or my uncle or my cousins.
Many Russians have relatives in Ukraine as well, I suspect they have similar thoughts.
If you have a good look on Russians and Ukrainians - we are but ONE nation, separated by political games.