Fitting In

The theme of the most recent section of Mango Street concerns "fitting in" with the surrounding culture.  Many of the characters in the book have trouble of this sort.  It's something that occurs in all cultures, to some degree or other.

In Japan, the saying about "the nail that sticks up" is widely recognized.  Therefore, you probably have some experience of seeing a child bullied during your school days.  Why did that person not fit in?  Please describe such a case, including details about the victim's character, and why he/she was bullied.

Also, as bullying is such a serious problem in Japan, please add your thoughts on why it is so widespread, and what can be done to reduce the number of incidents.