Malcolm X is an African American leader, in the civil rights movement, minister and supporter of black nationalism. He urged his fellow black Americans to protect themselves against white aggression “by any means necessary,” a stance that often put him at odds with the nonviolent teachings of Martin Luthr king .
She maybe didn't feel confident in herself or the character itself is shy. I'm not sure if I read the same book but Rachel might feel like she was wrong and her teacher was right.