It is wrong to insult people.
Michelle is a math tutor dealing with an exceptionally dull and distracted student.
Michelle wants to get through to the student.
Michelle explains the math problems in a new way that the student finds more interesting.
Michelle tries a direct approach and points out the student's many flaws to make them face their inadequacies.
The student Michelle is tutoring begins to understand the math problems given the new light Michelle shown upon them.
The student Michelle is tutoring becomes saddened and angered by the insulting direct approach and storms out learning nothing.