Re: white slaves - my read of history and the debates over African slavery suggests that the concept of liberty was such that I cannot comprehend any consideration of white slavery in America. I'll go back and read your earlier posts/articles, but if the Founding Fathers were troubled about blacks in slavery because of the tension it created with the original intent of the Revolution - certainly white slavery would not be a serious possibility. Remember - the folks that formed this country left England because of tyranny, subjugation to the will of the monarchy, etc. They were hyper sensitive to power/freedom/liberty etc.
I really suggest you pick up Founding Brothers. I think you'll find it enlightening on their thinking and intent as it relates to both slavery and the new American government.
Re: defining one's ethnicity, you are obviously completely free to define yourself in whatever manner that makes you happy. On the other hand, you cannot force society to necessarily go along with you. Biology is only relevant to the degree that it shapes one's appearance. So, one may be 1/100000000000000 black, but if they look black, society will label them as such. Now, becuase being black has all sorts of consequences in this society I can clearly understand how one might not want to embrance this "label". Nevertheless - if you look black, you're black.
It is clear that you have some really strong feelings about this issue. I invite you to write a Member Editorial about it. Unencumbered by argument and interferance, I'd love to read what you think.
Onward and Upward!