Ethnocentrism is a major factor in the divisions among members of different ethnicities, races, and religious groups. It’s the belief that one’s ethnic group is superior to another. Ethnocentric individuals believe they’re better than other individuals for reasons based solely on their heritage. Clearly, this practice relates to problems of both racism and prejudice.
This comes in stark contrast to xenocentrism - the belief that someone else's culture is superior to their own. For example, you might meet an American who insists French culture is better than the American way of living.
In truth, both ideals are a bit skewed. However, you’ll see in these examples of ethnocentrism that the practice is not only absurd, but potentially fatal.