No, YOU don't understand

"What don't I understand?" I wanted to know.
"Your heritage," she said.
Everyday Use, pg. 181

In this story, irony is very prevalent. Dee, who has gone out into the world and explored all around, comes back to her family full of "history" and "heritage". In fact, she lectures her mother and sister about how they don't understand it, and acts as if they have no respect for history. The truth, though, is that Dee appreciates how the heritage makes her "cool", but doesn't understand how it is present in her own life. If she truly recognized her heritage, she would not be ashamed of her home. She would not change her name to "Wangero Leewanika Kemanjo" just to avoid the name that has been in her family for generations. She would want to use the things that her family made, rather than putting them on display. Most of all, she would not block out her mother and sister, who can teach her more about her heritage than anyone. She may have some understanding of "African" traditions, but she doesn't understand her own family at all.