Ethnic Cultures
While ethnic cultures might be seen as overlapping with cultures of groups facing discrimination, they stand on their own (Han culture, for example, may be marginalized in the USA, but not in China). A common crisis among those who live by ethnic cultures arises from the mismatch between the ethnic culture with which they grew up (internal to their family) and the “true, historic version” of this ethnic culture.
Cultures evolve to fit their context. A more historically accurate execution of cultural traditions may work better for you, but ultimately it is your choice. There is no such thing as the “correct” manifestation of a culture. This is especially important to acknowledge given how frequently people discover what they believed to be traditional cultural practices are, in actuality, artificial previsions of that culture that had been marketed to them through media.