Whatever our skin color, country of origin, ethnicity, or culture, we are all one family, one blood, one race, the human race. What has rendered us apart?
One thought that I keep coming back to is that racism and the injustices of class structure are a very common human failing throughout history and across cultures. The way in which we discriminate between people is more a product of human psychology than it is genetic differences. In India there is a caste system which can present people from moving upwards through society. The UK had a cultural tiered class structure for a long time. In America, skin color is but one criteria that was used for discrimination. The Irish, Jews, Catholics, and a whole host of other fair skinned groups were discriminated against.
There is something in all of us that leads to tribalism, selfishness, othering, and a loss of empathy. Racism is a symptom of this underlying problem.