> No. It is not possible to convince someone that doesn't want [X's] to have the same rights [as] other humans, that they should have the same rights, with "rational argument."
Depending on what you mean by "rational argument", this is extremely wrong. All known expansions of our moral circle to encompass other humans and even other sorts of sentient beings, going as far back as Stoic philosophy in antiquity, have occurred precisely via (more or less overtly stated) moral/ethical arguments of this sort. Even OP's blogpost is itself such an argument!
There are people that your basic contention applies to - people you can't convince via such a 'rational' appeal to morals; consider the Christchurch killer, whom I just discussed in another comment in this HN-thread. And if hate content turns out to systematically, with relatively-high probability, offer up pretexts that such individuals can trivially use to justify, publicize, glorify etc. their murderous acts, that's definitely something which should be of grave concern to us; and a meaningful, perhaps even a decisive challenge to the usual arguments for maximalist free speech. But that's a very different argument indeed to the one you are actually making here!
Depending on what you mean by "rational argument", this is extremely wrong. All known expansions of our moral circle to encompass other humans and even other sorts of sentient beings, going as far back as Stoic philosophy in antiquity, have occurred precisely via (more or less overtly stated) moral/ethical arguments of this sort. Even OP's blogpost is itself such an argument!
There are people that your basic contention applies to - people you can't convince via such a 'rational' appeal to morals; consider the Christchurch killer, whom I just discussed in another comment in this HN-thread. And if hate content turns out to systematically, with relatively-high probability, offer up pretexts that such individuals can trivially use to justify, publicize, glorify etc. their murderous acts, that's definitely something which should be of grave concern to us; and a meaningful, perhaps even a decisive challenge to the usual arguments for maximalist free speech. But that's a very different argument indeed to the one you are actually making here!