Grelf wrote:Obviously I wouldn't like it, why do you ask?
Well, Russians (Rus people) didn't like it either.
Example. At some point Moscow and Grand Duchy of Lithuania became the only pretenders to unite Russian Princedoms. Lithuanian population and its territories were mostly Russian and, therefore, Orthodox. Because of the union with Poland Lithuanian monarchs turned to Polish traditions and religion (Catholicism). At some point they started to opress orthodoxies. This forced Russian knyazes of Lithuania to take the side of Moscow and swear allegiance to its monarch. And that was in the interest of the general population, because otherwise they were forced to change their religion and way of life.
Grelf wrote:Okay, let's forget the concepts and stick to the core of the subject. What makes the Rus people more "Russian" than "Ukrainian" or "Belorussian", considering that all of them were a single people back then? Maybe I really am failing to grasp this because my knowledge on the subject isn't much advanced, so do help me with this. What I understand is that Kievan Rus' got artificially divided into several parts and this division gave birth in the future to three different nations, correct? If that is the case I can't see what makes them more "Russian" than "Ukrainian" when they were all the same people and such divisions didn't exist back then.
As I said, their identity has shifted from "Russkie" under the influence of foreign culture of non-native rule (non-native to Rus people). It reflected clearly in the languages: they changed their original name from "Russkie" to "Ukraintsi" and "Belarusi".
As for language, the Old East Slavic language (which was called Russian (as a form of adjective "Russkie") or Slavic (earlier) by its speakers) splitted into different dialects after Rus declined. Western dialects, collectively known in English as "Ruthenian", were called by their speakers Russian or simple language. Those dialects continued to evolve into separate languages under the influence of Polish. While dialects under Russian rule slowly merged and were standardized into modern Russian.
The name "White Rus" (from which "Belarus" is derived) were used to describe all independent lands of Northen Rus (including and mainly Moscow Princedom). Modern "Belarus" is derived from the name of the governorship of the Russian Empire in the area of modern Belarus.
As for Ukraine. After Rus as a state had declined, territories of modern Ukraine were still known as Rus and their Knyazes (under Lithuanian rule) had words "Rus" (country) or "Russian" (adjective "Russkie") in their titles. The name "Ukraine" itself is of Polish origin and derived from the word root which means "border" and later "territory" (in both Polish and Russian). The term "Ukranian" is coined by a Polish nationalist in XIX.
Again as I said, these three identities are very close. They were forced to be perceived as separate ethnicities in three main stages: during the Russian Revolution by communists, during the WWII by Nazi, and after 1991 by local governments of all three states (and especially Ukrainian).