I think this is the whole race doesn't exist it is a social construct topic again. I think it is saying that where you grow up and the culture that you grow up with is more important than who you are related to. For example a person with totally white skin who grows up in Mexico is more Mexican than a person who "looks" Mexican who grew up in the USA without any connection to their heritage or anything perhaps because they are 4th or 5th generation in the states. But I am not sure I am just trying to interpret here.
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