>I was under the impression that "fake news" was originally referring to the phenomenon of "satire" websites that would publish click bait headlines with semi-convincing stories. "Obama signs executive order banning handguns" that sort of thing. The motivation to do so seemed to be financial but there could be social impacts to.
Kind of. Before it became (for lack of a better word) a meme, it essentially meant literally what it says: news website that published fake articles. This is what the British tabloids have been doing for decades, for what it's worth.
After the US presidential election, it quickly became a buzzword referring to the sorts of websites that posted articles that aren't just misleading but are actively made up and are presented as being true. These were mostly very, very right-wing Trump-supporting websites.
>It seems to have been rapidly adopted as a term to also include "opinions/interpretations I disagree with" - or in some cases "accurate things I wish weren't true".
By the alt-right, yes. Trump and his supporters immediately co-opted the term to mean 'things I don't like', which Trump regularly applies to CNN, which is certainly not fake news by any reasonable definition.
I don't really think that fake news is particularly chaotic. It's intentionally misleading, intentionally biased, intentionally targeted towards peoples' rasher emotions.