What was the relationship between Eugene and his father?

Papa-Nnukwu is a traditionalist, holding on to the faith of his ancestors. Kambili grows to love Papa-Nnukuw despite her father’s warnings that he is a heathen.

Papa Nukwu is a traditional believer who worship dirty. Papa is a strong christian- Catholic who thinks christianity is nothing but perfection and that he should not associate himself with those that have their faith in deity and serves ancestors other than God. He sees his father unwealth to be welcome in his nuclear family.