Beneatha's attitude is to provoke assimilation with black culture and its aesthetics.
Beneatha has a conflict with her racial identity because while she wants to get closer to black culture and her roots, she tries to move away from it and get more involved with white culture, which she recognizes she doesn't belong.
When she models the robes she got from Asagai, she feels that assimilation to black culture is right and that's what she should do.
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