As it stands, however, forcing the minorities into ghettos and using them a cheap labour seems to be more the Stormcloak style 
I don't know if you were joking or not, but I really hope you know that the Nazis also established more than a few ghettos for minorities (Jews mainly; I believe the first such ghetto was opened in October 1939 in what Germans call Petrikau, now Piotrków in Poland) and were often using the people living there in rather unfavorable conditions as a slave labour (though to lesser extend than concentration camps inmates, of course).
Now, when it comes to Adolf Hitler - I don't know if it's something I should boast about, but I tend to be called an expert on that matter, and not without reason; I've read
"Mein Kampf" and his
"Zweites Buch" (
"Second Book" - titled so because he himself never gave it any official title and because it was published after his death) and know Führer's life from the moment of his birth at April 20th, 1889 in Braunau am Inn in Upper Austria to his suicide at April 30th, 1945 in his Berlin bunker probably better than my own. Now, Ulfric might be a Nord supremacist only tolerating the other races and a ruthless megalomaniac wishing to be High King, ready to kill anyone who stands in his way, he might be Hitler-like in some aspects, but he is not Hitler - yet. We're talking about a computer game here, so it's all largely hypothetical, but I think that with Ulfric as a High King of newly-independent Skyrim, the Elves and Argonians would have been quickly rounded up under some petty pretext like them being
"dangerous aliens", spies, saboteurs or whatever - or even without any pretext at all, simply because they're not Nords. During the Civil War, Ulfric had his hands full, so the only thing he did was forcing the Dark Elves into the Grey Quarter and kicking the Argonians out to live in the docks, but imagine what he could do and would do with virtually unlimited power in his hands as a High King. War with Aldmeri Dominion would be his next goal, probably, but first he'd want to rebuild his forces and at the same time
"keep the fire up" by turning his Stormcloaks on the
"inside enemy".
As for Ulfric being a fascist - I, too, don't think we can call him that. I'd rather say he is simply a Nord nationalist and while nationalism is a strong component of both Fascism and National Socialism (Nazism), there are many other traits that Ulfric's ideology lacks to be called fascist.
Edited by Inquart, 09 September 2012 - 05:28 PM.