I would recommend 'a vision unfulfilled' by john m. Thompson. We used this book for our courses and its a great read for anyone interested tbh.

The main jest is that the marxist doctrine did not apply to tsarist Russia as the country was mainly an agricultural society based on a serf system. It was not a industrial capitalist society, so according to Marx's historical structuralist doctrine it wasn't ready for communism. They had to 'make the story fit' which led to Leninism and his avant-gardistic communist doctrine.

In tsarist Russia the royalty was western oriented, mostly due to ties with European monarchies but the distinction you supplied did not apply then. The Bolsheviks did not think in terms of slavic oriented or western oriented. This was so because as marxism was about class conflict and not about nationalism. It is why the communist manifesto ends with a thoroughly internationalist call. Proletarians of the world unite, you have the world to gain and but your shackles to lose.

So your question, in some way, is applying modern views which are not applicable to Russia 100 years ago. Its a bit of an anachronism. This also answers the second part of your question, class struggle was the main Bolshevik motivation for trying to establish communism, a quest in which they ultimately failed during Stalin's reign. Whose reign of terror transformed early communism into a vile and brutal dictatorship, with only communist rhetoric to provide a veil of legitimacy.

Cheers