People shouldn't wish that children didn't exist.
James was upset with his brother, and he wanted to upset him for a short time.
James wants to upset his brother.
James called his brother a bunch of swear words to his face.
James said he wished his brother didn't exist right to his face.
His brother was very upset for several hours afterwards because of how hurtful it was.
His brother was very upset for several weeks afterwards because of how hurtful it was.