As a little exercise, about once a day I take a pass through CNN or NPR, and then another through Fox News. Just to get a high level idea of what each side believes reality to be. It is fascinating how little overlap there is. For the most part I don't think people are really arguing with each other, they're just arguing with a straw man they have constructed to represent the opposition.
[Which is doubly confused since your left would still be considered solidly right wing anywhere else in the world (bar maybe in Australia/Canada).]
If I think back to the early 90's CNN used to be regarded in the same light as the BBC or Reuters, with actual breaking news and world correspondents. Now it just looks like a pantomine of people deeply outraged about something inconsequential.
I don't know if it's the 24h news business model that is broken or if you actually have some sort of psy-ops going on trying to create division, but there seems to be a very vocal chunk of the US that is caught in some sort of outrage addiction.