I can't get over how much the title reminded me of Mr. Mackey from South Park. "Stormcloaks are bad, m'kay?"
A few? Mate, argonians, khajiit and dark elves are barely even allowed into Stormcloak controlled cities. Though I agree they aren't as extreme as the Dominion, they're still blatantly racist.
EDIT: Also, didn't Skyrim belong to the Forsworn? Or was that just the Reach?
How exactly does it belong to the Forsworn (and it's only the Reach) ? Because they lived there before the Nords ? The Dwemer and the Falmer lived there before the Reachmen, does that mean it actually belongs to them and every other race should leave the land ? The Nords rule the Reach, that much is clear, it belongs to them. In Tamriel (as in most places), land belongs to the strong, to those with the will to claim it.
You're claiming an entire cause is racist simply because of xenophobes within it. Is the Empire racist then ? Plenty of xenophobic Imperials around, especially in Cyrodiil. The Stormcloak cause itself is not racist, it simply wants Skyrim to be independent.
Also ancient Nord belief states that Nords actually originated in Skyrim (were breathed into existence upon the Throat of the World), travelled to Atmora and returned many, many, many generations later. Which would mean they actually lived in Skyrim long before any other living race.