How do Uchendus' life and character impact upon the character of Okonkwo

In Part II of Things Fall Apart,
Uchendu, Okonkwo's uncle (his mother's brother) from Mbanta symbolizes the emasculated
and effeminate male--a sharp contrast to the violent, uber-masculine culture of Umuofia
to which Okonkwo belongs.  As such, he is a foil for our tragic
hero.

Before Okonkwo's exile, Uchendu had agreed that the
villagers of Abame were foolish to kill the white man, especially since the villagers
knew nothing about him.  This shows that both are in accord as to village foreign policy
and are aware of the future retaliations by white colonists.  However, they will differ
significantly once the British threaten the core of tribal culture: Uchendu will remain
passive, while Okonkwo will react violently.

After
Okonkwo's exile, Uchendu says that "Mother is Supreme."  His advice to Okonkwo is to
comfort his wives and children when he returns from Mbanta.  Even though Uchendu is a
wise old man, Okonkwo is inwardly infuriated by his advice because he and his mother's
tribesmen are weak and remind Okonkwo of his agbala (titleless)
father Unoka and his hyper-sensitive son Nwoye.