I couldn’t find the core of an argument in this piece. Could someone paraphrase? Defending to the death someone’s right to not be imprisoned for objectionable

I couldn’t find the core of an argument in this piece. Could someone paraphrase? Defending to the death someone’s right to not be imprisoned for objectionable opinions is quite different from enshrining a right to be free from social isolation. I don’t understand what part of internet culture is being missed.