Actually, don't worry about it. They're just classless punks that don't have a clue.
Be yourself.
If being "white" means being educated, etc.. to them, they're doomed to fail and you'll be able to exploit them someday
You can still be an educated person that conforms to a certain culture, yet still appreciate where you came from. In the words of Theresa Heinz Kerry, tell 'em to "shove it."