I don't like when people think I am black.
What would you think if someone mistook you for being Black?
I would think that he or she is an idiot who can't tell the difference between a black person and me.
It's okay for people to make a mistake. Even if you are getting mistaken for something you're not, you shouldn't insult people for making mistakes.
Who are you to say how I should talk to people?
No body is trying to insult you and you should cut them slack, just like you would want if you made a mistake.