Not all nords are rascist though, Ralof for example is very open to any other race.
My stormcloak characters are not rascists either, they just lost faith in the Empire.
If only I could persuade Ulfric with the Dunmer/Argonian problem in Windhelm...

There are racists in every group/political faction...in Skyrim, in the real world....some are even comprised almost entirely of racists, ie. the Thalmor.
The Dunmer have been in the Snow (Grey) Quarter for 150+ years...apparently without any access to paint or brooms. Prior to that they were slavers in Morrowind. They are described in the Lore as being "clannish" and "distrustful of other races." If, in 150 years, only one or two has had the initiative to get out of the Grey Quarter, perhaps they need to read more Shakespeare...ie. "the fault, dear Brutus, is not in our stars but in ourselves."
Or Walt Kelly "We have met the enemy and he is us."
Ulfric is in the middle of a war to free Skyrim from under the thumb of the Thalmor and its Imperial lackeys, creating a nanny state for a small and singularly uncooperative portion of the population is unrealistic and logistically impossible.
Ironically, in the aftermath of an Imperial victory, Brunwuff does nothing about the Dunmer or the Argonians either.