Same reason I support Donald Trump, though I will not get into that here as I am not allowed. Ulfric is standing up to Imperial Injustice, he wants to make Skyrim Great Again and drive out the Puppets of the Thalmor. He supports religious Freedom and wants to lower taxes. Aslo people say the Stormcloaks are racist which is entirely false. The answer of who is racist is not Stormcloaks it is Nords itself. All across Skyrim even in Imperial territory Nords mistreat the lesser races, for example Khajiit aren't allowed in the citys even the ones in Imperial Territory. Aslo If Ulfric wins people say the Empire will fall to the Thalmor. Who cares! The Empire's already their Puppets and they would probably fall to the Thalmor anyway sense they are so weak. I honestly don't know how half of you people can be so arrogant and prefer tyranny over freedom. But then again it's amazing how many people prefer that in America. Anyway that is all I will say for I have no farther need of proving my point.
VIVA LA STORMCLOAKS