In my mind it makes sense that the more extreme people tend to gravitate from public circles and tend to land in places that have less moderation and more freedom of speech unfortunately.

YouTube is also that way. It's just that it gets buried down by the shitload of people who use it.

Eh to degree, but the reason neonazis and bigots seem to flock to/make up a majority of these sites is often because they're getting banned on YouTube - and these video platforms opt to survive by leaning into that instead of properly moderating their platform.