What is the significance of the discussion between mama and Beneatha about africa?

This is about race and family dynamics. Beneatha introduces Lena to Asagai. Mama, determined to prove to her daughter that she understands her modern viewpoints on Africa, recites Beneatha's previous tutorial on the injustice of Africa's colonialism and the infiltration of Christianity. Having "flashed a superior look at her daughter upon completion of her recitation, " Lena becomes truly sympathetic towards Asagai. She looks at him like her own son, asking him if he misses his mom and inviting him to come over to eat since he is so far away from home. Over the course of the conversation, Asagai calls Beneatha "Alaiyo", which in Yoruba means "One for Whom Bread Is Not Enough."