You are right in a certain aspect that 8chan is more compartmenalized than Reddit or Youtube, but there is still a world of difference in the discoverability of the various boards on 8chan versus the internet at large. A non-radicalized 8chan user can end up on /pol out of mere curiosity and be pulled in. No one visits the Daily Stormer without a predisposition to hate.
I understand. However, I think when one site becomes a domain for this behaviour (and domain is and important word here, in both senses) then the effect is different.
