Dostoyevsky, The Idiot

I've just finished reading this one - Parts one and three were riveting, but part 2 dragged a little and part 4 focused slightly too much on political questions and social issues which have moved on a lot since the 1860s. I'm left wondering what we're meant to make of the protagonist's fate - I don't know whether Dostoyevsky, in pointing out that there's no place for a genuinely Christian man in Russian society, is condemning Russian society as being anti-Christian or Christian morality as being unrealistic and unworkable.