I did not write the definitions. I just try to use the definitions that actually exist in order to communicate more effectively.
race: a family, tribe, people, or nation belonging to the same stock
Race - Definition and More from the Free Merriam-Webster Dictionary
stock: the descendants of one individual
Stock - Definition and More from the Free Merriam-Webster Dictionary
If these definitions are the least bit true, then race exists. And not only that, it exists on many levels, as I have shown.
I prefer to consider all definitions of a word before I start making assumptions about a particular word.