[demifiend]

Nazis, fascists, and white supremacists already have a safe space that nobody seems to care about knocking offline. It's called Stormfront, and it's not Mozilla's fault if a web forum running since the 1990s isn't good enough for ignorant hitlerjugend who mistake corporate-owned social media platforms like Facebook or Twitter for "the internet".

[BlueTemplar]

Also, there's always the "Dark Web" (Tor & Freenet ?). I haven't been on Freenet for more than a decade, I hear these days websites there have 'warnings' like "This website does NOT contain child pornography" ?