A matter of words

Hi everyone ! Already back on Culture Critics ! (be careful, blogging is an addictive behaviour ^^)
Today I'd like to react to two things dealing with the same topic : racism.
First, we were asked last week to thing about what we would like Barrack Obama's election as the USA president to change in this country or even in the world. Of course this election is remarkable because Obama is black-skinned and because Americans are renowned racist (at least in France...).
Then, I saw at lunchtime, in the "Zapping" of canal+, an extract from a TV show in which Eric Zemmour, a french journalist, said it was obvious that a white person and a black person belong to two distinct races.
(here is the video, in french of course : http://www.youtube.com/watch?v=yRR-KWSqhEg)

As I see it, someone who's racist is not necessarily someone who says something like : "I don't like blacks", but everyone who believes that it does exist several human races (like Eric Zemmour). Of course it's completely wrong, you can't establish a race based on the different forms of a single gene. It's even totally absurd if you know (and everybody should) that a race is defined by a genome, that is to say by an entire list of genes (and not their forms). Otherwise you could invent human races based on eyes color or hair color...or whatever you want. Science tells us that all human beings have the same genome, therefore this is obvious that there are NO human races but ONE human race : THE human race.

Nevertheless, in english we often use the word "race" to denote skin color, including in official documents, and even in the Universal Declaration of Human Rights ("Article 16 : Men and women of full age, without any limitation due to race, nationality or religion, have the right to marry and to found a family.").
That's what I would like to see changed in USA. Using the word "race" in that way should not be politically correct, because I believe that if you use that word to denote skin color, it amounts to recognize there are several human races based on skin color, and thus it is, according to me, a major step towards racism.