It is a good counter-argument. I will admit that I still marvel at the way it is structured. I do not think I can match that. It is a compliment.
I will open by saying that, from my perspective, in accordance with Sturgeon's law, 80% of books on Ebay and Amazon ARE spam and should be delisted for the well-being of general populace and positive feeling of accomplishment for busy-bodies, who seem to be running those operations. If we start removing spam, we better get the proper authorities ready to remove the superfluous, pointless and downright dangerous material that spam produces.
Still, is your standard 'did enough people complain'? If so, that is a bad standard, and most certainly not how internet was devised, or was intended to work.
I think the issue I have with 'casual rasism' in this book is that I do not see it, and yet my access to the book is limited, because sufficient amount of people whined. In short, I do not buy this argument.
But lets say I do, and we want to talk spreading bad ideas. US is ok with allowing Mein Kampf. How is it different? Why are those ideas ok to spread, but not that one? How is attempting to destroy an entire population less offensive than 'casual racism'? Do we have some sort of diagram that shows how victimhood is rated?
The answer is really simple. It is not better or worse. It is just an idea. And if 'casual racism' is an idea, then its spread is absofuckinglutely a freedom of speech issue. Just not one one can easily get behind, because it is, well, bad. But that does not mean you can just pretend it does not exist.