As a matter of fact, we cannot judge the author from our own perspective, as a native born Chinese. By the way, we also have no rights to criticize her. But we can imagine the cultural background and the western idea the author has accepted, which must have influenced the author. I quite agree with the idea of Monica that "the author physically receives some Chinese language but she doesn't accept it mentally.
It's typically of her to be white-washed, which is a group of people feel the white are more advanced so that they want to get rid of the Asian appearance. The root cause of the phenomenon is the first language those ABC have learned, and the result is that recognition of their root culture is reducing.
Though she and her brother consider the Chinese culture abhorrent, we cannot criticize it because that's caused by the background. The only thing we can say is that the attitude they towards his family. Though it's widely acknowledged that western culture is famous for freedom, the author is lacking in the basic respect for her family.
Jessica 孙