Ethnocentrism

Ethnocentrism is judging another culture solely by the values and standards of one's own culture. The ethnocentric individual will judge other groups relative to his or her own particular ethnic group or culture, especially with concern to language, behavior, customs, and religion. These ethnic distinctions and subdivisions serve to define each ethnicity's unique cultural identity. Ethnocentrism may be overt or subtle, and while it is considered a natural proclivity of human psychology, it has developed a generally negative connotation.

Read more about Ethnocentrism:  Origins of The Concept and Its Study, Anthropology, Biology and Evolutionary Theory