Balderdash. Racism is a global sin which can be see in all cultures and races. It is by no means isolated to America, and, indeed, given the "melting pot" amalgam of races and cultures which comprise We the People, not to mention our worship of Freedom, Equality, and Opportunity, America remains one of the least racist and least balkanized nations on Earth.
The section I excerpted is just another Left-wing propaganda smear which isn't supported by objective reality...