Back to the original discussion:
I know people from many countries, and my experience is that one on one I can get along with almost all of them. Of course my selection does carry a bias, but even so on the whole on the personal level most people are very hospitable.
It is when people organise themselves into groups and nations things are different. A

eady long before the invention of money the 'money' of a group was the territory they controlled. You even see this with chimpansees. And with many different types of animals. Somehow many of us think of people from another group or nation not as real people. Witness how football hooligans can fight each other and sometimes even people get killed.
It gets even worse when the entities get bigger, the armies get bigger and the weapons get more powerful. Probably every place on earth has been occupied by many different nations at various points in history.
In the west, and in particular the EU, this concept of proto-money has been more or less abandoned. After WWII the Dutch got 'compensated' with a small piece of Germany. After a number of years they organised a vote there and when the people voted that they preferred to be part of Germany the territory was given back to Germany. In Eastern Europe it looks like many are not so far as to give up this concept of proto-money.
So Ukraine and Russia go their own ways. What is wrong with that. Kiev was once the capital of a proto-Russia? The east coast of the USA was once ruled from London. Does that give the USA the right to invade England?
Please Russia, be happy that you have the whole of Siberia with all its incredible richness. Don't lament the loss of a number of peripheral states, while you can be a wealthy nation if you concentrate on how you should conduct your internal affairs.