I disagree with your characterisation, there was a lot of criticism of Collateral Murder from young white liberals! Assange and wikileaks, at the time, were presented as apolitical truth-seekers, not as journalists. Journalism is very different from what Wikileaks claimed to be, and Collateral Murder was not presented as a piece of journalism, it was presented as a leak. You cannot conceivably compare what Wikileaks claimed to be at the time, to what the New York Times claimed to be at the time.
Go back in time to when Assange was first accused of sexual misconduct and you’ll find that a lot of people disliked him: it’s revisionist to claim that he was perceived a noble hero by the left until he was accused of sexual misconduct or until he started his crusade against Hilary Clinton (as if any young white liberal liked Hilary Clinton…)
To me, there is no real difference. Or at least not enough to warrant any criticism of wikileaks (w.r.t how they handled Collateral Murder, not in general of course).
Whatever they did was much more effective than american journalists were doing at the time. It was less so to push a narrative than to expose an event that would've been swept under the rug, just like many many other "oopsies" the americans ignored at the time.
As to liberals being pro-hillary, I don't disagree that it wasn't true in 2008. But those liberals almost certainly grew to avidly support her in 2016.
I guess I'm biaised since I have been exposed to the "other side" of the iraq war and the war on terror, as a practicing muslim in a pretty political family. But to me it still amounts to complaining or criticizing from a position of pure privilege (I'm referring to the criticism at the time of the video's publication, not your comments!), as Americans basically found it "yucky" to be exposed to the results of their own imperialist policies. In that context, I think WL would've been criticized no matter what because the actual issue wasn't that they were pushing a narrative, but more so that they were making some Americans uncomfortable.
Go back in time to when Assange was first accused of sexual misconduct and you’ll find that a lot of people disliked him: it’s revisionist to claim that he was perceived a noble hero by the left until he was accused of sexual misconduct or until he started his crusade against Hilary Clinton (as if any young white liberal liked Hilary Clinton…)