The Validity of Race: Race Neutrality

People from Russia to Iran to India to Malaysia are considered Asian. What do these geographic regions imply about Race?

According to Census Race information, people whose origins come from Europe, North Africa, and the Middle East are all considered to be White/Caucasian. With the difference between different groups of people being less than a thousandth of a percent, does the concept of Race actually make sense? Are attempts to categorize people based on physical description valid? How is it a useful concept, or is it still a useful concept?