Europe was the pinnacle of sophistication and intelligence and humanity. Early Europe was made up of Greeks and Italians. The Greeks fought and mixed with the great Persian civilization, and the Romans were dismantled by the barbaric Gallic heathens. Egyptians and northern Africans heavily influenced both cultures. The Chinese culture views American culture as crude and undisciplined.
European culture is full of excess, temptation, lavish grandeur.
Anglo-Saxons hardly come from pure roots. They consist of a lot of mixed races. Not only is mixing unavoidable, it's also desirable. The more diverse one's genes, the better the immune system and the better the variety of the eventual DNA makeup. A pure genetic background leads itself to amplifying the weaknesses and concentrating the strengths, effectively widening said weaknesses and thinning out the strengths.