It is worth reading what Stalin wrote on nations at this time. Most people view Stalin as just a murdering thug. However he wrote extensively and these writings were often put to action. Thus on Nations:
Stalin, Writings, Vol 1, Prism Key Press, 2013
I. The Nation
What is a nation?
A nation is primarily a community, a definite community of people.
This community is not racial, nor is it tribal. The modern Italian nation was formed from Romans, Teutons, Etruscans, Greeks, Arabs, and so forth. The French nation was formed from Gauls, Romans, Britons, Teutons, and so on. The same must be said of the British, the Germans and others, who were formed into nations from people of diverse races and tribes.
Thus, a nation is not a racial or tribal, but a historically constituted community of people.
On the other hand, it is unquestionable that the great empires of Cyrus and Alexander could not be called nations, although they came to be constituted historically and were formed out of different tribes and races. They were not nations, but casual and loosely-connected conglomerations of groups, which fell apart or joined together according to the victories or defeats of this or that conqueror.
Thus, a nation is not a casual or ephemeral conglomeration, but a stable community of people. But not every stable community constitutes a nation. Austria and Russia are also stable communities, but nobody calls them nations. What distinguishes a national community from a state community? The fact, among others, that a national community is inconceivable without a common language, while a state need not have a common language.
The Czech nation in Austria and the Polish in Russia would be impossible if each did not have a common language, whereas the integrity of Russia and Austria is not affected by the fact that there are a number of different languages within their borders. We are referring, of course, to the spoken languages of the people and not to the official governmental languages.
Thus, a common language is one of the characteristic features of a nation.
This, of course, does not mean that different nations always and everywhere speak different languages, or that all who speak one language necessarily constitute one nation. A common language for every nation, but not necessarily different languages for different nations! There is no nation which at one and the same time speaks several languages, but this does not mean that there cannot be two nations speaking the same language! Englishmen and Americans speak one language, but they do not constitute one nation. The same is true of the Norwegians and the Danes, the English and the Irish.
But why, for instance, do the English and the Americans not constitute one nation in spite of their common language?
Firstly, because they do not live together, but inhabit different territories. A nation is formed only as a result of lengthy and systematic intercourse, as a result of people living together generation after generation. But people cannot live together, for lengthy periods unless they have a common territory. Englishmen and Americans originally inhabited the same territory, England, and constituted one nation. Later, one section of the English emigrated from England to a new territory, America, and there, in the new territory, in the course of time, came to form the new American nation. Difference of. territory led to the formation of different nations.
Thus, a common territory is one of the characteristic features of a nation. But this is not all. Common territory does not by itself create a nation. This requires, in addition, an internal economic bond to weld the various parts of the nation into a single whole. There is no such bond between England and America, and so they constitute two different nations. But the Americans themselves would not deserve to be called a nation were not the different parts of America bound together into an economic whole, as a result of division of labour between them, the development of means of communication, and so forth.
Take the Georgians, for instance. The Georgians before the Reform inhabited a common territory and spoke one language. Nevertheless, they did not, strictly speaking, constitute one nation, for, being split up into a number of disconnected principalities, they could not share a common economic life; for centuries they waged war against each other and pillaged each other, each inciting the Persians and Turks against the other. The ephemeral and casual union of the principalities which some successful king sometimes managed to bring about embraced at best a superficial administrative sphere, and rapidly disintegrated owing to the caprices of the princes and the indifference of the peasants. Nor could it be otherwise in economically disunited Georgia.
Georgia came on the scene as a nation only in the latter half of the nineteenth century, when the fall of serfdom and the growth of the economic life of the country, the development of means of communication and the rise of capitalism, introduced division of labour between the various districts of Georgia, completely shattered the economic isolation of the principalities and bound them together into a single whole.
The same must be said of the other nations which have passed through the stage of feudalism and have developed capitalism.
Thus, a common economic life, economic cohesion, is one of the characteristic features of a nation.
But even this is not all.
Apart from the foregoing, one must take into consideration the specific spiritual complexion of the people constituting a nation. Nations differ not only in their conditions of life, but also in spiritual complexion, which manifests itself in peculiarities of national culture. If England, America and Ireland, which speak one language, nevertheless constitute three distinct nations, it is in no small measure due to the peculiar psychological make-up which they developed from generation to generation as a result of dissimilar conditions of existence. Of course, by itself, psychological make-up or, as it is otherwise called, "national character," is something intangible for the observer, but in so far as it manifests itself in a distinctive culture common to the nation it is something tangible and cannot be ignored.
Needless to say, "national character" is not a thing that is fixed once and for all, but is modified by changes in the conditions of life; but since it exists at every given moment, it leaves its impress on the physiognomy of the nation.
Stalin assembled what was the Soviet Union but in so doing supported nationalism as an identity element. It was Rosa Luxemburg who opposed Stalin's view and sought to eliminate nations to create a pan communist state.
One then must ask, is Putin a Stalinist or Luxemburgite?