Don't read the cutting diary at all. Its completely wrong that it was published, Emilie should be more considerate of her muffins well-being. Its not a diary at all just one endless monologue about how great cutting is. I don't judge her for cutting, of course not, but she should keep it between her and her people.
if you feel uncomfortable reading it, imagine how uncomfortable she felt living with it. you have the option to put the book down, but she lived the nightmare. people struggle with the addiction of self-injury everyday, the vast majority of them go it alone. knowing there's someone out there that felt that same wave of emotion, that battled those same demons, is a help, not a hindrance.
it's an uncomfortable subject, i'll grant you that. breaking the silence on such things is an amazing thing: it sheds the isolation, alleviates the feeling that you're facing the demons alone, thus taking the power away from the issue and putting it back into the survivor's hands. there are many uncomfortable subjects out there -rape, abuse, abandonment. telling someone they should keep quiet because to speak of the subject is unseemly is the same as telling them they need to deal with it and suffer on their own. then nobody gets helped. i read in an article on the psychology of torture that people have a tendency to sympathize more with the culprit than the victim, because the culprit asks for nothing but for you to turn the other way, to not see what's happening, whereas the victim is a walking, talking open wound that serves to remind that the world can be an ugly place that makes no sense at all, and people hate to be reminded of that fact. but it's something we've gotta face, and continuously silencing voices isn't going to change it.
think of it this way (in the words of Emilie herself) ...well they should be disturbed, because there's a story that ought to be heard...
i haven't received my copy of the book yet, so i've not seen where she glorified it. having struggled with self-injury for over twenty years (even if i haven't cut in a long time, the urges are still there) i understand that when you're in a state that has you reaching for the blade, logic and reason go out the window and self harm really does seem like the only way to cope. while to the outsider this may seem like glorification, it's really just the emotions that go along with it. it's ugly, it's scary, but if bringing those emotions to light helped her stop, if it helps someone feel they are not alone, or helps someone understand why their loved one hurts themselves, then it's actually doing some good and shouldn't be left by the wayside.