Let's frame this up correctly; a nation-state is one where there is only one predominant ethnicity (i.e Japan). There are also nation-states that have two founding nations (ie Canada and Belgium). Most states are multiethnic states.
It would not be an alien concept to have introduced constitutional variations (https://t.me/c/1795183969/561) to allow different peoples to live within the territorial integrity of one state (aka Minsk Agreements). Ukraine is not a nation-state due to its large Russian minority, and smaller Hungarian, Polish, Romanian minorities.
How then do you "deoccupy" 4 million people living in Donbass? Would that not constitute ethnic cleansing? For anyone who had doubts as to Zelensky's plans for this region. And yet his views were not racially divisive before he took office - see here. (https://t.me/c/1795183969/1402)What happened?
If the second video is not working, << try view it here >>
