No, because we'd still be, you know, not racist.

But I think suppressing a viewpoint is counterproductive. Instead, the holders of those viewpoints should be held to the light, and it's a Twitter problem in that such people can be completely anonymous or even fake. Hard to have a public debate when some of the participating citizens are fictional.

Yes, and no? Proposing racial segragation is something is highly offensive to non-white people, discriminatory in and of itself. If you're an employer, letting some guy talk about his beliefs in racial discrimination in your workplace is creating a hostile environment for your other employees. If you have any kind of position in a community, you shouldn't allow it there either.