I'm always amazed when so called professional pilots post on here critisizing fellow professionals and inferring that they would never make such a mistake. Very easy to do, but I'd bet money this crew got trapped by a number of different factors, as has been inferred above, into making the error(s) that led to the outcome. As for the ones who have never operated commercial jets, stick to commenting on subjects you know something about.
True negligence in these kinds of situations is rare and declaring it without a proper investigation into an incident is contrary to just culture, and I would say safety in general.