You are confusing propaganda with news. Trump saying something on twitter isn't news. Somebody posting an article on facebook isn't news. You have to have a vetting process, and a check/verification process, be it at the editor, but more rpeferably at the reading end too. And no matter what side of the political process you, both Democrate and republican are faulty of using hoax stories, let us call them by what they really are. You take trump as example, but even he fell down the trap with that so called "jihadist" video which was an hoax.
During the hayday of journalism , say 1940 to 1970-80ish , this vetting and verification process was understood, and serious journalism rose above the yellow press. But starting 1980ies and strongly 1990ies, it declined because people are pretty damn cheap. So vetting and serious investigation dropped, dropped and dropped until the cost are so much cut that every damn idiot copy/paste one source be it a AFP , Reuter or a 3rd party rag, check it, they even don't bother changing the wording. Heck now people are considering the shit out of facebook news. It isn't. They are just stories, as likelies to be hoax, taken out of context, or even news, without vetting or fact checking you can't tell. Since there is no vetting process on either side (writing/reading), no double check , those hoax get spread. heck scam too. Steorn. Rossi eCat. And so forth. How often I tried to get people to spot the warning sign ? And get ignored because I am a "liberal" or a "rightwingnut" (depending on the slant of the story I try to point out has problem) or even a "close minded scientist" ?
And frankly, I have been saying for years it is a problem, albeit in skeptical forums, not here. The problem is that critical thinking is a skill one need to learn because it is pretty damn easy to fall into one's bias as long as they go the way one politically think. Nobody Is teaching critical thinking. So for years we have been seeing hoaxes rise as stories and being handled seriously. Heck among skeptic group, what do you think we try to fight for ? Critical thinking is THE skill everybody should be getting. And yet again I predict that this will fall by the byside , being seen as propaganda from butthurt people.
The only point where you are right, is that a lot of media are butthurt now and see that as a problem. But that does not mean the problem is not real. It is real, and I have seen the rise of hoax and scam being treated very seriously , far more than previously in spite of fact checking being so easy nowadays.