People on many campuses have come to see the world in terms of oppression and non-oppression, and since Muslims in the West are seen as a stigmatized group ("oppressed") and Charlie Hebdo ridicules them ("oppressors"), people side with the "oppressed". Of course this doesn't make much sense, at least not in this extremely simplistic way, but that's not relevant for people's attitudes/behavior if they truly believe this.
However, this is a phenomenon that I only know from Tumblr and the wider interwebz, for I suspect that Dutch culture regarding free speech is, like Danish culture, on the more "liberal" end of the spectrum - probably because the Netherlands has always been a country of minorities: there was no majority during pillarization (and even before).
It might be that my perception is influenced by the people I hang out with, but even then, I haven't seen anything apologetic about the Charlie Hebdo massacre in the media
coming from liberals, not even on the most PC websites. What I did see, however, was many young Muslims putting pictures with "I love my prophet" as profile picture on social media. Conspiracy theories about Charlie Hebdo not being a real thing / being staged by the US and Israel were also popular (sigh...). Many young Muslims clearly perceived the attention for Charlie Hebdo as another "Islamophobic" outrage, and they felt the need to stand up against that. This is obviously something understandable, since these people are in a hard position between Western and Moroccan/Turkish/etc. culture, but for society this raises lots of worries and concerns about our multicultural society's future and the preservation of essential freedoms. Yet because of my background I think I might understand how these people feel, even if I disagree with them. However, I don't think their "opposition" to free speech is something new. This new form of (marginal) "liberal" opposition to free speech, however, is certainly something new.
In short, my answer would be that opposition to free speech is becoming mainstream in a certain "liberal" bubble: on campus, on Tumblr, among some inner-city left-wingers... But it is not
yet becoming mainstream in society as a whole.
and...
Marokai is pretty much spot on here.
