There are no anti-russian documents because Assange nor any of his activists care about Russia. They care about the Western world, that's why they prod it.
Strange because Snowden lives in Russia, you'd think he'd care about his new home. Surely he cares about all the oppression that's going on in here?
If this is the case, they can't claim to be objective.
They don't claim to be objective, they claim to pass on data that is real. You don't know what they don't pass on, you don't know what they change and you can't know whether or not something is real without outside verification. Think of them as an imperfect channel that seems to present - to date at least - an insane amount of real data and the occasional manipulated video.
They are objective about the western world.
I live in the western world, so that's what I care about.