When Obierika sees Nwoye back in Umuofia with the missionaries, he asks Nwoye, "How is your father?"
Nwoye replies "I don't know. He is not my father."
Okonkwo disowns Nwoye after he joins the Christians, claiming Nwoye is no longer his son, no longer his children's brother. Okonkwo tells his children, "You have all seen the abomination of your brother."
Nwoye had converted to Christianity, forsaking the gods of his father and his father before him.
Ezinma was Nwoye's half sister. Both of them share the father of Okonkwo, but Ezinma's mother is Ekwefi; Nwoye's mother is Okonkwo's first wife.
Nwoye initially felt fear and intimidation in response to Okonkwo's confrontations. However, as time passed, Nwoye began to distance himself from his father's harshness and eventually disassociated himself from Okonkwo and his beliefs.
The book does not say this explicitly until Nwoye joins the Christians, when Okonkwo calls him an abomination. However, Okonkwo often wishes that Nwoye was stronger, saying that at his age, he should already have impregnated a wife and taken a farm. Okonkwo also wishes that Nwoye were as strong a wrestler as Obierika's child, Okafo.
Okonkwo was a masculine man, and expected his son to follow in his footsteps. Nwoye ended up being more effeminate, and either way could not follow in his father's footsteps, instead being obscured by his shadow.
Nwoye's actions prove to show him to be a man of Unoka's caliber, not Okonkwo's. It reflects badly on Okonkwo, and makes it hard for him to distance himself from his father. Further, Okonkwo has always had high hopes for his son up to this point, despite what has happened so far. This reality disillusions Okonkwo.
he converts to Christianity
Nwoye's father, Okonkwo, views him with disappointment and disdain. He perceives Nwoye as weak and effeminate, traits that he believes are unbecoming of a warrior and a man in their culture. This disappointment is compounded by Nwoye’s lack of interest in traditional masculine pursuits, leading Okonkwo to harshly criticize and attempt to toughen him up, ultimately straining their relationship. Okonkwo’s rigid expectations reflect his own fears of being perceived as weak, which he projects onto Nwoye.
It isn't known if Nwoye's emotions extend to hate. Indeed it seems somewhat unlikely as Nwoye appears to try to reconcile with his father later in the novel. If Nwoye does indeed hate his father Okonkwo, reasons might include:Okonkwo frequently beats Nwoye, and the rest of Nwoye's brothers and sisters.Okonkwo is too stereotypically manly, and discourages Nwoye's feminine pursuits including his love of stories.Okonkwo kills Ikemefuna.Okonkwo nearly kills Ekwefi, another symbol of his brutality.Okonkwo forces Nwoye to leave the household when he shows an interest in Christianity.Okonkwo threatens to kill Nwoye if he ever sees him again.
Nwoye is Okonkwo's first son, and serves as a contrast to the manliness of the Igbo his father exemplifies. Nwoye's like for the feminine, in particular the stories his mother tells, causes him to not relate well with his father. Further, Okonkwo expects him to be as strong as he was, and to have taken a woman by now, but he is not as strong, and has not yet taken a woman. Okonkwo fears that Nwoye will be like his grandfather Unoka, who was a lazy drunkard debtor and tied without title or property.
Okonkwo disowns Nwoye when he converts to Christianity. Okonwko originally assaults Nwoye when told of Nwoye's association with the Christians, resulting in Nwoye leaving the compound and joining the Christians.