This article is a very concise "slice" of the dubious 'reality' of today. It frames a very important dialogue (that sadly it seems we are unlikely to have -- and if we do have it, it seems unlikely to affect anything).

Perhaps worth adding to the list silo effects is others in your silo "one-upping" your opinion, vs just agreeing with you. You say "we need to burn some witches" and I say "let's burn ALL witches." And then people talk each other into positions more extreme than they had before.

I read a great (academic) book on the cultural impact of the invention and spread of the printing press. The author doesn't get into contemporary parallels, but they emerge just the same.