Right, because we all know the antivaxx member of the extended family never brings the topic up in person... People radicalized have their entire identity stru

Right, because we all know the antivaxx member of the extended family never brings the topic up in person... People radicalized have their entire identity structured around a need for confirmation. When you only talk about a specific topic 24/7 online, what happens in person is that you still bend over backwards to tie every possible subject into that topic. A QAnon believer sees it everywhere and points it out to family. A flat earther is going to make some comment about NASA at dinner guaranteed. It existed previously in cult behavior, but that sociological structure has now been distributed from small local gatherings to global reach online.