Russian here, living in Russia. Not surprised about this at all. Actually, I predicted that this would happen. By starting the war, Putin has wiped out multiple perceived notions about Russia (the myth of the defender nation, the second-strongest army, and the "Tolstoyesvsky"-centered culture among them).
Paraphrasing Anton Chigurh: "If your culture brought you to this, of what use was the culture?"
I think this is a temporary sentiment. In my mind Bach and Beethoven are in no way associated with the Nazi regime, for instance.
From my point of view, if you discard artist because of country he was born in, it's only your loss.