I've noticed the same phenomenon. I think it is, at least partly, driven by the collapse of local power structures that the local information bubbles (great phrase, btw!) enabled. Those power structures are built into our genes, and have roots that go back ages. They are fighting back, or at least our innate responses are fighting back. It's tough to run a church or a school or a family, when those under you can reveal your ignorance quickly on their phone. And so the power structures are attempting to exert their own reality. It's what Trump runs on, he pushes a reality that people want to exist, and are willing to let go of actual reality to get it. Not that the phenomenon isn't also seen in the Left, it just is less malignant (for now).