"Julian Assange published evidence of war crimes committed by the US Army."
I assume you mean the famous "collateral murder" videos?
https://en.wikipedia.org/wiki/July_12,_2007,_Baghdad_airstri...
That is my biggest issue with the whole wikileaks thing. Because it might borderline a warcrime by being careless - but it was no murder.
Yet it was framed as the US army just killing journalists for fun. But it was not at all like this.
There was active fighting, the journalists that were killed were embedded with active fighters - and their camera misstaken for an RPG. Those things can happen, especially if the journalists do not mark themself as journalists.
"The cameras could easily be mistaken for slung AK-47 or AKM rifles, especially since neither cameraman is wearing anything that identifies him as media or press"
The second attack while civilians evacuated and the children killed in the van - that was the bad thing. But it was still in the context of US troops receiving fire. So not at all allright, dirty war in a urban area - but not intentional murder. It was collateral damage in a wrong war.