Moving from one school to another one is always a huge step. It's never fun to be the new kid. What's even harder is moving from one school to another one in a completely different country. Now, not only are you the new kid, but you're the new kid with a new accent and a new culture that you suddenly have to become the representative for.
Americans and foreigners have an interesting relationship. Firstly, a lot of Americans consider everyone to be a foreigner, even when they are living in their own country. Sometimes it can be difficult to move past stereotypes when trying to learn about someone else's background. It is a good thing to celebrate other people's cultures, and ask them questions with an open mind, but we need to understand that sometimes people just don't want to share.