When questioned, such young people say that they don't expect to live long in the present system, and that there are no positive prospects for them, but they will go out protesting. This protest is tragically turned back onto the same African-American population, a population devoid of a sense of dignity, angry at its own powerlessness. Another is evidence of crime and sabotage of the system. They wage open warfare against those who have for so long waged secret warfare against them. There are other consequences, too.
Racism is very expensive.
All of this costs money. Racism makes a whole country simply look bad. One may point to the universal condemnation of South Africa for so many years, and how it was excluded from participation in world events and world trade. Racism as directed at Roma in Europe has many origins. Color prejudice is just one of them.