It's a good point, although I think it's more about people waving the banner of free speech. As the variety of material available shows, we live in the best era in history for free speech. But it's not like people need to talk about that; they just talk about what they want.

Those banned from one distributor or another will of course wave the banner of free speech, because that sounds much nicer than, "Why won't people just leave me alone to organize purging society of all the Jews?" But it's not like the government is suppressing them; it's just that distributors have decided that they don't want to associate with a very small number of people. And that banner-waving has always struck me as a bit false; it's not like, e.g., Nazis are known for their tolerance of dissent, so I have to suspect that their fondness of "free speech" would evaporate the moment they had any real power.