They have modified their Ethnicity.
An ethnic group, also known as ethnicity, is a group of individuals that identify with one another based on shared characteristics that set them apart from other groups.
Physical characteristics such as skin color or bloodline, linguistic characteristics such as language or dialect, behavioral or cultural characteristics such as religion or customs, or environmental characteristics such as living in the same area or sharing the same place of origin are all examples of ethnicity.
A group of people who share a common culture (beliefs, values, and behaviors), language, religion, lineage, or other trait that is frequently passed down from generation to generation. They may be from the same country or reside in the same neighborhood.
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