An interesting article written by Hamid Dabashi, an Iranian professor at Columbia University in New York, defines the ideological conviction of the social construction of races. The author says there are powerful interests vested in sustaining the bloody history of racism in Western countries. This means that the ideology of racism is an useful tool for those in power to divide people to rule them better.
In this context, the richest 1% of people use racial categories, such as black, red or yellow, to conceal the real battleground, which is the clash between the upper class and the middle class. A poor person branded as "white" has nothing in common with a rich manipulator of such racist ideologies.