There's a theory that's been floated by conservatives for some time that Democrats constant whining about "messaging" as their only flaw is a side-effect of the willful echo chamber effects. That because the "right" is used to the left-wing media bias they're constantly confronted by oppositional ideas, go on MSNBC, etc. to face oppositional debate, etc. Democrats avoid Fox News, ignore and immediately dismiss any kind of conservative/Republican criticism as without merit, etc.
As a result, they're caught flat footed endlessly because of that lack of experience with opposition POV. Jonathan Haidt's test where conservatives did better than progressives at guessing and articulating the opposing point of view illustrated this to an extent.
I don't want to present this as an explanatory fact but instead note that the premise of the theory is continuously reinforced in the mentality GR points out about GAF. Never does anyone actually "debunk" anything they just scream about how it's debunked and how they have so many links that it's not worth their time to inform you. Thus their arguments aren't even persuasive to people who are favorably predisposed to them. Even conceding a criticism as having merit, no matter where it comes from, is instantly attacked as undermining the cause and plus it's been debunked anyway.
And it's not just electoral politics, you can see it in the race threads, the gender threads, gaming side, whatever. But politics provides a good example because of how insane everyone is being about it. The infighting about Democrats/progressives and their leaners is ferocious enough that of course a rational conservative/Republican would have no interest in piercing the bubble. So you're left with the garbage representatives.
It becomes a one-way ratchet. The conservatives retreat into their own echo chambers has only made the problem worse writ large, and it gives both groups a reason to immediately dismiss anything that comes from outside it and runs counter to the talking points they're getting.
As long as the spectre of Republicans are haunting America, there won't be any room for criticism of Hillary or Democrats. They've already been hand waving criticism of Obama with "but the GOP will use it during an election!" Now they've just got the ultimate Trump* card to play forever and ever until the next villain who's even worse comes along. And it's really just in service to seeing their corporation win. How it wins, what people get when it wins, what better options are available (PC) are all irrelevant because it's about winning over the villain who is always and forever deploying sinister underhand tactics like advertising or favorable spin.
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