Earlier quoted context omitted.
Yeah, no. People will see the vile toxicity right up front (it's not hidden at all there), and they'll leave in 5 minutes.
I think I understand what you're saying, but if it was so vile and so toxic, why would people keep returning to it and stay so involved? Whether you happen to like it or not, these are communities just as much as any other. I think it would be better for the human condition if, instead of dismissing them as "vile toxicity", we looked at what they're saying and what's caused them to feel a need to say it. Then again,…
Though as you say, it might be necessary to understand them to prevent such extremism from spreading. But at that point it's very well worth asking if all that 'understanding' is really more effective than just banning such platforms.
Worked for Reddit, for instance. There was a study that showed that the prevalence of hate-speech was decreased after they banned the racist subreddits. Even people engaged in those communities became less extreme after you've removed their echo chamber.