[rmlew]

Hardly a historical anomili. Kieven Russ was conquered in the 1200s by the Mongol-Tartars but reconstituted itself in the form of Moscovy in the 1400s.
Not exactly. The Rus was split into three groups: the Russians, the Ukranians, and the Byelorussians. Moscovy simply conquered the northern areas and constituted a distinct group decended from the Rus.

So did Poland, Bohemia and many other countries. Most of the Balkins...especially Serbia and Greece...hardly an "anomali".

You have a point here. However the diaspora is a factor that none of these groups had to contend with.
Time is also a factor. Poland was an independent country until the 1790's. The Bohemians/Czechs were independent 800 years ago. The Serbs and Greeks were under Turkish tyranny for under 500 years.
The last Israelite state was in 620 for one year as the Jews and Samaritans revolted against the Byzantines in the last Byzantine-Persian War.

[Stavka2]

Ahh, but the Armenians are in the exact same position....they've been under Persian hemogy for countless centuaries and also have a huge dispora.

As for the Rus, the Kieven Russ empire actually stretched to Krakow. Now the Ukrain was never really settled and Ukrainians (which means the Edge Of...ie Civilization) was a nomad steppe land of Turks) The Cossaks were a blend of Russ and Poles who became the "Ukrainians". Belaruss was simply under Litho-Polish rule for a long time and it was only during the 16-1700s that is was liberated from Catholic holds. So no, there were never "three" distinct groups...the area of Moscow was actually the Eastern most holds of the old Kieven Russ.