Re: Nuance
IMHO the Internet unluckily helps to build "distribute clans". Often violence is the effect of a tribal structure - you see it in sport hooligans, organized crime, terrorism, antagonists groups, even organized parties when they overcome a democratic state structure and becomes the real rulers.
Democracy is an attempt to weaken clan/tribal groups, often organizing them in larger "parties" which has to work withing a defined set of rules, and at a more granular level assert citizens are equal regardless of what group they belong to.
Public instruction and adopting values which are established outside the clans is another way to try to break clan structures and ties. In larger group made from different people, it's more important to find compromises and avoid unacceptable behaviours.
Everywhere you see clan structures well alive, life quality decreases quickly, violence increases and economy worsen (unless there are easy sources of money) because the main aim is protecting and impose the clan, even at the price of worse conditions overall - it's Milton's "Better to reign in Hell, than serve in Heaven."
The internet is a very powerful media which allows for building tribes quite easily, outside the old constraints. Actually, bad ideas like Facebook are exactly built on the tribe idea - not a surprise since it comes from those stupid tribal groups which are US university fraternities or whatever they are named.
Still, Freedom of Speech has limitations even in the most democratic countries. Because there are values with higher priority - like Life. Inciting to kill people - and thereby deprive them of the fundamental right to Life, can't hide behind the right to speak freely.
It would also be important to avoid to use different way to judge freedom of speech. For example, we're discussing if hate speech about killing people should be censored or not, but if an old Australian tennis player speaks against same sex marriage, it's just a barrage of blame and requests of censorship.
If we believe there are values that above the right of speak against, we have to treat them equally, and not pick each time again what is OK for our tribe.