I have mixed feelings about Wikileaks. On the one hand, I like when gov't wrong doing that has been covered up is revealed. But on the other, Assange has the view that countries should always say the same things in public as in private (He said so in 60 minutes inteview). I think this is just not a standard that any nation can live up to. Most decent people don't live that way and neither would I expect well run nations to do so. Even allies will make public statements while having more private views and back channel communications. I really don't see that as wrong. It is only if it is used to propagate hurtful lies or hide important truths that make it wrong.
As for his criminal accusations, I don't know what to think. I am skeptical of the accusations and the way they were made. But I am equally skeptical of the defense of him I have heard. I don't know what the truth is. I can only hope if he committed a crime, he gets a fair trial. And if he didn't, that all accusations and allegations would be dropped.
If the U.S. is involved in the massacre of civilians in Syria, I would want to know about it. And I would want those responsible to answer for it. However, I do think that scenario unlikely in the case of Syria, from what I have read.