Why are Americans quick to identify the Whites of Spain as "mixed" & "less" White than other Europeans?

As a full blooded White Basque of northern Spain,I simply laugh at their complete IGNORANCE.I will list a few facts about my people that many may be unaware. 1-All pre indo-European tribes of entire Europe have dissapeared,except the Basques,2-Basques have the highest concentration of Rh negative blood(a common occurence of peoples native of Europe)than any other White ethnic group in Europe.3-Adolf Hitler had offered scholarships to university students in Munich,Germany to promote more research on the orgins of the White Basques of Spain,4-The Basque language(Euskera)is the oldest living language of entire Europe & is related to no other language on earth,5-`As other Whites ethnic groups of Europe shifted to the creation of kingdoms,empires,republics,nations-state… Basques always remained neutral neither remaining backward or imilating to the broad non Basque population of what would become Spain or France,6-Extensive skull & DNA/Blood tests have revealed that our White racial bloodlines are the purest in entire Europe.7-Throughout Spain's history the Basques have fought off the Celts,Visigoths,Romans,Moors,Jews.