I can agree with your sentiment but there's plenty of evidence from canon that bullying is seriously endemic to Hogwarts, not to mention the Morcanon point of view where slytherins have found themselves gaining status predominantly from racism against and bullying of mudbloods/hufflepuffs. The entire hogwarts system could almost seem to be DESIGNED to generate ingroup/outgroup hostility in huge amounts to layer on top of the basic cliquishness and age-based splitting of regular school.
also, it's strongly implied in this chapter that the enemies hermione is making now are NOT fighting her because they think of themselves as bullies, but because they view themselves as proud slytherins/griffyndors, and see hermione insulting their entire houses.
from racism against and bullying of mudbloods/hufflepuffs
I don't really think racism is the right word here. Well at least no more than say classism (in general reading HP its very hard to miss the obvious parallels between the divide among muggles and wizards and the class divisions there).
Update: Discussion has moved on to a new thread.
The hiatus is over with today's publication of chapter 73, and the previous thread is approaching the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it.
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system. Also: one, two, three, four, five, six, seven. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: