I'm not suggesting pushing people away, I'm suggesting attempting to set up an equally attractive (or even more attractive?) rabbit hole that tends to expose people to actual others, rather than just parroting second-hand opinions about those others.

(sorry to repeat myself, but I'd thought YouTube was exactly such a place. The other day I got some yemeni beats, which was certainly nothing I'd have been likely to search out on my own. Obviously —as with TikTok— different tastes can lead to narrowing as well as broadening, however.)

That sounds interesting. I'm not fond of people proclaiming that this desire for increasingly radical media is inherently human, so I'm open to the possibility of a different feedback loop.

Do you have any idea of what that would look like?

Not really, that's why I'm asking here.

"Increasing radicalisation" just sounds much more like former-Yugoslavia than former-USSR to me, and I think the latter became former in a much better manner than the former became former.

See https://news.ycombinator.com/item?id=24373042 for the best I've come up with so far. (the Atlantic article covers deradicalisation of actual trained terrorists, essentially by hooking them up)

Footnote 2, although from a fictional source, is pretty much the whole problem with the idea, from a human factors standpoint.