In the famous "balcony" scene, when juliet says "romeo, romeo! wherefore art thou romeo? " (act ii, sc. 2, line 33), what is she asking?

We are tasked to interpret the famous "balcony" scene, when juliet says "romeo, romeo! wherefore art thou romeo?" (act ii, sc. 2, line 33). Juliet at this time is simply asking of all the family why is romeo a Montague?.

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