Before the term 'alt-right' was even coined there were AFA/Antifa plus a myriad of other leftist 'revolutionary' groups calling for the destruction of whatever

Before the term 'alt-right' was even coined there were AFA/Antifa plus a myriad of other leftist 'revolutionary' groups calling for the destruction of whatever happened to be in their way, islamists of every plumage vying for the position of the most vile representative of their ideology, a multitude of incarnations of Nazi-fetishism, etcetera. In other words, no need to point at a specific ideology to personify the tragedy of the commons. When there is no censorship there will be places where things are said you'd rather not hear. The best advice I can give is to avoid those places, that way you won't hear what they're saying. Even without censorship there are laws which limit what can be said so a censorship-free 'net does not necessarily equate a cesspool.