I don't think it's getting censored intentionally, in the sense someone is taking that action specifically. It's falling quickly off the front page because the algorithm is biased against this kind of discussion. If it was getting killed by flags it would end up saying [flagged] in the headline as it disappeared. And you can't downvote submissions, so it's inferred from lack of upvotes.
The former is easy to answer. It's a hot, emotional topic and getting comments way faster than it's getting upvoted.