You actually highlight the problem very well. Any group of people can make their own websites, publish their own papers, produce their own films, cross-refencing each other all along the way, thereby creating the illusion their their alternate reality, though largely fabricated, is as true as the real world we all live in. But it isn't. The "facts" within that sphere are only supported by other "facts" within that same sphere, and they fail to connect to the larger, long-standing and global web of data, research and opinion that are far more diverse, well-documented and debated. And by failing to connect, or only tenuously connecting, to the larger conversation they are rendered irrelevant, except for their use as a weapon towards personal or political ends.
The problem is that you tried to attribute this behaviour to conservative sources specifically, in order to rebuke someone else here, but in reality this is not a specific trait of conservative sources.
I just fucking said that. Any sphere, if sufficiently disconnected from or contradictory to the mass of human knowledge, is highly suspect at best. Most likely it's complete garbage. Pollution that hinders the healthy advancement of human knowledge.
That's a strange choice of words. Divergence from human beliefs is perfectly legal, because beliefs are fallible. How can you possibly be ignorant about this when you just now described an echo chamber yourself?