you can say—with the Internet, you can say this. … Holmes said it doesn't mean you can shout "fire" in a crowded theater. Well, what is it? Why? Because people will be trampled to death. And what is the crowded theater today? What is the being trampled to death? … It will be answered over time in a series of cases which force people to think carefully.So, apparently, unlike the relatively natural reaction to hearing the word "fire", a decidedly UNNATURAL action, like murdering Christians, may lead to inhibited speech.
At least, when it offends the easily-offended Muslim population.
UPDATE: Upon re-reading the Slate post, it's clear that they disapprove of any restriction on the 1st Amendment - what I wrote previously seems to suggest the opposite.