Some of them can't help it; that's the way they were raised.
Some, like the Russian historian I happen to know somehow, begun to think all isn't well in the Land of Soviet Union already when they were young.
Official Soviet history tells Zhdanov died because of "natural reason" and in some way that's true; it was quite natural for politicians and officers to get a bullet from MGB's (Secret police between NKVD and KGB) gunmen. His wife (was) moved to Siberia where she died in a camp later.
I wonder what Boroda's version is...