This is an excellent point. Recall that Russia had been very pro-US all the way back from the time of our founding under Cathrine II "the Great," they stuck by us during our Civil War, we purchased Alaska from them in 1867 so they could pay off war debts from there Crimean War obligations, etc...
It was not until the atheistic philosophy of those poor-little rich kids (you know...that German fella, Marx, and that nit-wit Brit, Engles) married, as it was to the pseudo-Science espoused by that other Brit, Darwin, that the Communism originally spawned by the French Revolution-era Jacobins became to be known as Soviet Communism in the USSR as it was for 70 long years.
The history of Christianity in Russia stretching back to 1000 AD was a foundation that even philosophies of Marx-Engles-Darwin could not assail for very long. Remember, that Bush openly relates to Putin on the basis of what he sees as their shared Christianity.
Time marches on, as does truth, and bankrupt philosophies do wind up on what Reagan termed, the ash heap of history.