I'm not applying my own form of ethics. I'm applying logic. I'm saying that Objectivism is unethical for the same reasons racism is. Now, if you believe that racism is ethical, then fine, by your definition of ethics Objectivism may indeed be ethical, but most agree that treating one group of people worse for purely arbitrary reasons is wrong. Objectivism is the practice of treating a group of people worse for arbitrary reasons (i.e. they aren't you).