What were some reasons for kievan russia isolation toward western europe?

Russia has part of its roots in European culture where the ideas of goodness, honor, and freedom are understood as in the West. The Viking raiders came from the North. Traders from Scandinavia also settled. They became the rulers of Rus, the city-principality of Kiev and forerunner of the Russian state. The other part of Russia has Asian roots. The Mongols, [Tartars] conquered Moscow in 1234 and Kiev in 1240, and ruled with despotism, invaders unstoppable, making Russians their slaves. Russian blood is a mixture of Slavic, Finnish, and Tatar. Kievan Rus had converted to Orthodox Christianity in 988. When Moscow liberated itself from the Tartar yoke in 1480, the modern Russian state was born. Distant from Europe, the new state was cut off from Constantinople which in 1453 had fallen to the Muslim Ottoman Turks.