I wonder who Shishkin is writing this for, and why he bothers.
Readers interested in Dostoyevsky, Tolstoy, or Chekhov are presumably intellectuals. Presumably, they will be familiar with the countless examples from history when, driven by patriotic fervor, countries cleansed themselves from the culture of an adversarial state, including language, literature, music, linguistic borrowings, scientific contributions, common history, etc. etc. Presumably, these potential readers should be sophisticated enough to separate the crude politics of the day from the valuable contributions to the history of art or science.
Is he _really_ interested in the audience whose interest in the 19-th century Russian literature is predicated on the Russian politics of the 21st century? Why does he want to reach this audience? And, more generally, in the environment that is arrogantly dismissive to "old white men" in general, why worry about the readership of Dostoyevsky at all?