The USA practically finished off the natives of America - is that not threatening ethnic survical?
Not just the Americans. The Spanish , too, had imposed a race based caste social system in their empire in Central, and South America with the caucasian Iberians at the top, the mestizos on the center and the african and mulatto on the bottom. Let us not forget that the Spanish had adopted a systematic brutal conquista paradigm in their empire. The extermination of Mayan, Aztec and Incan culture and adoption of Spanish culture by use of force. We are referring to cultural genocide here in regards to the loss of Aztec, Incan, Mayan and other mesoamerican heritage.