Xenophobia is when people are scared of people who are different than them, particularly people from other countries, cultures and backgrounds. In the United States, xenophobia is sometimes seen when people don't want immigrants coming to live in the country or when people make fun of people with different accents or looks. It can also mean people think people from other countries are dangerous or scary even if they don't actually do anything wrong. People who are xenophobic are usually scared of people who are different from themselves because they don't understand them or don't feel comfortable around them. Xenophobia can lead to bad things like violence and discrimination, so it is important to try to be more understanding and accepting of people who are different than you.