Wikileaks itself is no angel. Have you ever wondered how they get the information they publish? The simple and most probable answer is: Julian Assagne is a Russian agent, working with GRU. That's also the reason why he helped Snowden get assylium in Russia after the whole NSA surveilance thing.
All Assange has is evidence (in the form of leaked documents)
Even if he were a proven state agent, I am happy to have information about how my representatives are working against my interests in a systematic way.
As a former counteritelligence officer this guy seems to know what he's talking about. Unless of course he has his own agenda, but the facts presented are verifiable and pretty convincing.