What Facebook Did to American Democracy
theatlantic.com
theatlantic.com
The real problem is that the media has abandoned objectivity. Look, for example, at the graph in the article showing partisan bias to one side or the other (it's about half-way down). ABC, NBC, and CBS are better than I expected, though all three lean left. But look at the New York Times. It's nearly as partisan as HuffPo, or (in the opposite direction) as InfoWars! And the NYT is the one getting all the Facebook shares (along with CNN and Breitbart - though CNN was only half as biased as the NYT).
Much of the media abandoned objectivity. The respectability, the reputation for objectivity, that they once earned but no longer deserve, they then lend to partisan positions. This then drives the left as saying "credible source", and the right saying "your 'credible source' isn't credible", and it all turns into a shouting match, with Facebook as the megaphone.