Okonkwo must die because he kills another man. The justice of the white man is to take a life for a life taken.
Because Okonkwo have to kill him because the Oracle decreed that Ikemefuna must die:)
Ikemefuna called Okonkwo father. It would be unnatural for a father to kill his son. The boy was also affectionate towards Okonkwo, and it would be like a betrayal.
Ogbuefi Ezeudu visits Okonkwo to deliver a message from the Oracle that the village has decreed for Okonkwo to be banished from the clan for seven years as punishment for committing a crime. Ezeudu delivers the message out of respect for Okonkwo's status in the community and warns him to not take any drastic actions.
The oracle concluded that Ikemefuma must die. Okonkwo kills Ikemefuma to show his peers that he is not weak. It is ironic that Ikemefuna is, besides Okonkwo, the most manly man in his family.
Okonkwo is ordered to perform a sacrifice for beating his wife during the sacred week of peace. Later, Okonkwo and other men are other to pay a fine for burning down the church.
The Oracle of the Caves and Hills pronounces that Ikemefuna must die. If talking of Okonkwo's specific action, then Ikemefuna is killed by Okonkwo because Okonkwo is afraid of being thought of as weak.
Obierika despairs for Okonkwo and blames the colonists for Okonkwo's death. His best friend, a man who took two titles, has been driven to dishonourable suicide and must be buried like a dog.
"Okonkwo was a man." "Did you see that man, Okonkwo?" "You are my son. Okonkwo, I am your father!"
Okonkwo was not ostracized. Okonkwo was exiled for killing a man. Okonkwo was spoken badly of when he was not outwardly repentant after breaking the Week of Peace. Okonkwo was distanced from after he kills a messenger.
Uchendu gathers his children and Okonwko for a meeting and tells Okonkwo of his duty to not let despair break his spirit. He says Okonkwo must be comforted by his motherland, not despondent. Uchendu finally speaks of his own suffering and his wives' suffering, showing Okonkwo that life goes on despite one's suffering.
Ogbuefi Ezeudu warns Okonkwo not to take part in Ikemefuna's death, as Ikemefuna calls Okonkwo "father" and considers him a role model. Ezeudu advises Okonkwo to avoid involvement to prevent any harm to his own future. Despite the warning, Okonkwo ultimately participates in Ikemefuna's death under pressure from the village elders.
Okonkwo is shown to be incapable of adapting to both the nature of his tribe and the power of the European colonists. Several particular events include:Okonkwo beating his wife during the week of peace.Okonkwo missing Ekwefi with his gun.The declaration that Ikemefuna must die.The accident which causes Okonkwo to be exiled.Nwoye's conversion to Christianity.The imprisonment of Okonkwo after burning the church.Okonkwo's hanging.