I don't care what colour, nationality or religion some one is, as long as they are not assholes I don't have a problem with them.
But also, any body that is offended by what some one with who you share no emotional bond, says something negative to you, regardless of context, is pretty lame. They are only words, sounds made with our mouths and written as characters. They are just a form of communication. There is no point of upsetting yourselves by getting upset by some one who isnt important in your life.