wow i never got that impression when i listened to 2 of his books but reading that post they mention it's more in his journalistic pieces so its possible. Im not a fan of banning books, but this Dostoyevsky Society almost certainly knows his works better then me.
There's also his antisemitism and what you might call his Christian (specifically, Russian-Orthodox) chauvinism, and his hostility to Western culture. Like the bloggers say, he's not very consistent in his positions, at least when you consider his work as a whole--his so-called "polyphonic" approach involves putting several worldviews in conversation with one another and showing no obvious preference for one over the others.
Interestingly, the Soviets discouraged reading Dostoevsky, as opposed to his rival Tolstoy, whom they saw as amenable to a Marxist reading.