I'd call it "moderation" rather than "censorship", but if you want to view the "uncensored" version of the site, you can click on your sign-in name in the top-right of the header, and you will be taken to your profile. From there, set "show-dead" to "yes" to be able to view this and other flag-killed comments.
I and many others on the site prefer to view it in this form. If you have show-dead on and some minimum number of HN points (30?) you can "vouch" to revive a killed comment. I thought this particular example would have been better handled with a downvote-of-disagreement rather than a flag, so I vouched for it. I can understand mettamage's reaction, though, and don't blame him for flagging it.
I and many others on the site prefer to view it in this form. If you have show-dead on and some minimum number of HN points (30?) you can "vouch" to revive a killed comment. I thought this particular example would have been better handled with a downvote-of-disagreement rather than a flag, so I vouched for it. I can understand mettamage's reaction, though, and don't blame him for flagging it.