1) While he meant something different, yes, Ukrainians were involved in the policies that led to the Holodomor. Just who are "the Ukrainians"? I take it they don't include Ukrainians working for the Soviet government? The idea of people being divided by more things than our chosen category, in this case nationality, is of course complicated history and as we have seen many times in the past nobody wants complicated history.
After all, Russians starved.
2) One has to remember, when it comes to political opposition, that in a totalitarian state disobeying or even disagreeing
is opposition. Ideas of some sort of armed conspiracy orchestrated by Pilsudski were made up, drawing on the busy Stalinist mythology of vast conspiracies against the socialist motherland.
3) Millions of Ukrainians did end up in cities, in Ukraine and other parts of the Soviet Union. And by the way, during the various clearances and related tribulations of the early industrial period, groups of Britons as big as half a million were given that same choice to abandon their way of life or starve (this is out of a much smaller population). Industrialisation may be progress but it's horrible.