Originally Posted by
Endus
He doesn't give the origin of all this enough examination, because it critically informs what's occurring right now.
In short;
The media in general took a neutral, fact-based, analytical position, if we go back 30+ years. That was their role; to inform the populace, and provide informed and educated opinions on analysis. Politically, they were relatively centrist. Some might personally lean one way or the other, but they weren't partisan.
As time progressed, the Republicans shifted further right, and moved away from factual analysis. This is why they hold views such as opposing global warming science, why they've developed economic views that economists have flatly discarded as hokum, and so forth. Not all Republicans, but enough that it increasingly became the core of the party's ideology. As they shifted further right, the Democrats also shifted further right, becoming centrist by any international comparison.
The media stayed basically where it always was, but now they were confronted with one side of the political divide that stuck (mostly) to the facts, and another that (again, mostly) didn't. And they reported that accordingly. This made them seem biased to one side, but it reflects a shift in the Parties, not the media.
Then, Fox News et al sprung up, to give "the other side" of the discussion, which is a silly concept when the media was already centrist. As can easily be seen when you compare American media's positions to the media of basically any other developed nation. The new "right-wing media" was biased by design, and part of their refrain was that they were biased to offset everyone else's bias, but this is an appeal to a false middle, that because they are SO off-base and partisan, the "truth" must somehow lie between them and the rest of the media. When in truth, they're just being partisan and biased, and the rest of the media largely wasn't.
And now we're in the state we're in today. Academia and the media are largely getting staffed by centrists and left-wingers because they still recognize facts for what they are, and don't try and mold those facts to fit a particular bias. Right-wingers in the USA are only being excluded if they demonstrate that kind of agnosticism towards facts that's creating the issue.
And no; it isn't inherent to being right-wing or conservative, at all. It's a specific factor of American partisan politics, and it's only really gotten bad in the last 20 years or so, so it's not even a long-term trend.
When a fact-based stance is deemed to be "biased against conservatives", you can pretty easily see what the hell is going on. See the "debates" on global warming. On whether gun violence is a problem. On health care. Etc.