No, it isn't. Also, censorship is bad, and the fact that there's so much public demand for it nowadays is sickening. Even here at HN there are plenty of people who'd praise FB for this move.
HN "censors" posts all the time. There are moderators who go around deleting posts, and even the users here dare to downvote, suppressing the speech of others!
Indeed, I'm just perplexed by people being so concerned with this specific instance of censorship. I would expect people to only get outraged by more mainstream stuff getting banned at this point, considering reddit and youtube started banning much more benign content ages ago (e.g. most gun related content).