Greatest threat to Russian-Ukrainian unity is Putin who destroyed it forever. A generation of Ukrainians have been raised knowing only Russia as the aggressor state in a war.
https://www.atlanticcouncil.org/blogs/ukrainealert/putins-war-drives-ukraine-towards-true-independence/
The main terminal of Donetsk Sergey Prokofiev International Airport
Russo-Ukrainian War
15,00 Dead 1.5 million refugees.
https://en.wikipedia.org/wiki/Russo-Ukrainian_War
https://en.wikipedia.org/wiki/First_Battle_of_Donetsk_Airport
It wasn't the Russians who destroyed it.