Why does kaiga tell nwoye blessed is he who forsakes his father and his mother for your sake?

In this context, Kaiga is expressing the idea that devotion to a new belief or faith should take precedence over family ties and social expectations. By forsaking his father and mother, Nwoye is showing a commitment to the new beliefs or values that he has embraced, which Kaiga sees as a positive and courageous act in pursuit of spiritual growth and fulfillment.