Athletes: Why Blacks Are Better Than Whites

Suppose, for argument's sake, that I am a racist. Suppose that my psychology, my economics, and my politics are predicated on an irrational hatred of Oriental peoples. Finally, suppose that, in the service of my psychological, economic, and political needs, I claim that the peoples of the Orient are shorter than the people of the United States and that they are so for genetic reasons. Would the irrationality of my needs cast doubt on the correctness of my claim?