In denouncing racism and other forms of extremism, we have to be careful not to turn society into a heavily normalised monoculture that, ironically, many of these extremist groups are themselves proponents of.
This is a really great analogy, it also shows when big brother is starting to over-reach it's authority.
[1] https://en.wikipedia.org/wiki/2006_transatlantic_aircraft_pl... [2] https://en.wikipedia.org/wiki/Richard_Reid
In the United States, extremist groups have enjoyed the right to speak in public for decades and it almost never turns into violence. Violence is so rare at those rallies that it makes big news when it happens, such as we saw recently in Charlottesville.
We value our right to free speech so much that we tolerate people spouting hateful garbage, as long as speech is all they're doing. It's really a great sight to see the two sides shouting at each other in peace.
Eliminating racism doesn't turn society into a monoculture--it permits lots of different cultures to coexist without threat of violence.
The world would be better off in every way without racism (except for those who directly benefit from racism--but fuck those guys.)
OP is right, racist websites can be viewed a lot like a canary in a coalmine. That this canary has been killed implies the air might be getting unsafe to breathe.