I'm not sure about Americans but I would say the majority of the the world mistrusts the US Government. While I'm not saying Assange doesn't have flaws, this isn't exactly a point in time I would believe anything I read about him, Wikileaks or his character, this is the time for character assassinations.
We also need to keep in-mind (as the article states) the guy is practically in jail, him and other whistle blowers are being seriously screwed over by the US Government, so IMO most of these profile pieces are going to paint a picture of someone who isn't in a great place right now. I often here people complain about the state of Wikileaks, but what do people expect?
On character assassinations, another example I could give right now is Trump, maybe it's just because he is low hanging fruit, but boy is the media giving it to that guy like I've never seen, it's to the point where I've pretty much stopped reading the news in Australia right now because there are just constant trump bashing articles, it feels like the work of "The Ministry of Truth" in 1984. Yeah he is controversial, but is he worthy of so much attention ? From what i understand Hillary is far from flawless also.
To conclude my rant, I'm taking this with a grain of salt :)