This is again you trying to fit reality into neat, hard, rigid categories. You think murder sentencing can be "fair" and "consistent", but censorship can only be "unfair" and "inconsistent". Binaries that only exist in your imagination and don't exist in the real world. Categorical thinking is bad, and I suggest you read my post on this kind of thinking: https://news.ycombinator.com/item?id=32674580
Murders, just like any other crime or just like spoken words, aren't homogeneous. Premeditated murder and torture is different to a spontaneous unplanned murder. Judges and juries are subjective, and will come to different sentences for the same crime. Juries are imperfect, and will convict some innocent people or let some guilty people off by sheer accident. There is lots of unfairness here. And it's necessary unfairness, because we accept that systems can be desirable even if they aren't perfectly fair.
> First, it's not completely obvious that the mere utterance of an idea is something that should be prevented or punished.
> Well, why those and not others?
We've already been over this. I am not a moral relativist or moral nihilist. I will advocate to ban strings of words that have a non-trivial probability of causing stochastic terrorism or genocide, by the same logic that we choose to ban direct calls to violence. You are not a moral nihilist either, because you presumably are happy that theft is illegal, despite the fact that your opinion on that is purely subjective, as are all political and moral opinions.
> Third, murder (and, to a lesser extent, crime in general) is an exceptional occurrence. It's not something that's happening trillions of time per day.
This isn't relevant. Drink driving and petty theft happens many times a day but it's a crime for a good reason. And if it weren't a crime, it may happen much more often.