Of all the characters that have developed in the series, Sakura has changed the most. She realised her weaknesses and then worked hard to become strong. Being in a team where everyone was extraordinary, she was normal and still advanced to a level where she could be on par with the rest of her team. Sakura’s progress is worth commending.
Thus the chain of hatred begins. That is what we know as history. And from it, we learn that humans are incapable of opening their eyes; of understanding each other! The world of shinobi is ruled by hatred.