Yes they do. Aragorn is of the purest race of Westernesse, and his special abilities are in good part based on this. The subjects of prince Imrahil are sadly mixed in race, although the prince himself is of rather pure breed, etc. It's not about this being an allegory for England or whatever, it's about the general world view and the things that are considered noble and admirable.
Which reminds me that some of the comments in the book are made through the eyes of the characters. Of course enemy foreigners would seem "orcish" to a hobbit, because for him orc means evil and enemy means evil (and for the most part he would be right).
Tolkien isn't racist though in the Aryan sense, for sure - he hated Hitler an thought Jews were the same as everyone else, if not better. In the lore, Aragorn's bloodline was blessed by the Gods, pretty much - like hercules' bloodline. It's not just that he was the right kind of white.
