Those who are insulted by it.
Typically, it's not difficult to avoid being uncivil: You use insulting speech, someone calls it out, you apologize, folks move on. But when there is a widespread problem with marginalized groups concerning hate speech that is clearly impacting fundamental rights of that group and social, non-governmental intervention is shown to be ineffectual, it would not be "totalitarianism" for legislation to be made regarding the mitigation of the erosion of that group's fundamental rights to safety in a community.
Holy Carp - that is an absolutely horrible justification for law -- far beyond rational on close inspection .. and anathema to the principles of Justice. Did you think out how that would work .. if all I need do is say that I felt insulted by something .. for that speech to be made illegal .. the person making arrested and punished at what ever the going rate is for such crime .. I see Rudy was ordered to pay over 100 million in damages for insulting the two election workers .. thats right in line with -- Rule of Law principle "punishment should fit the crime" but if the crime and its effect is completely arbitrary .. totally subjective on the basis of each individual .. guess the punishment should be too .. in the perfect world of the woke collectivist .. operating in fallacious utilitarianism mode.
Apologize for the Jargon .. but, you could use a lesson or two in this area so go look it up.
"Erosion of fundamental Right to safety in a community" --- Reeking of utilitarian justification for law .. on the basis of increasing happiness/decreasing harm to the collective.
Sounds like a similar fallacious utilitarian justification for the Vax mandate .. similarly fallacious. Giving the ability for each individual to arbitrarily make law on the basis of something they feel insulted by will not make the community more safe .. but more dangerous for everyone .. who at any time could be accused of insulting someone and criminally charged .. and punished .. for something you had no idea you was insulting.
So this is not even a good utilitarian argument -- doing the reverse -- making the collective less safe .. hence the term fallacious utilitarianism .. aside the numerous other reasons why this justification for law fails