For a while it looked like the Guardian was opening itself up to critical discussion of Islam and immigration. Now they've simply shut down comments on most articles on those subjects. When they do open them up, the censorship is mind-boggling.
I had this comment censored the other day: "Sending someone to prison for saying 'I prefer white children' is political tyranny, pure and simple."
My memory might be deceiving me, but I believe this article (link) had 1400 comments yesterday, now pruned down to 300.