Neither side has the moral high ground, but the empire is certainly the lesser of two evils. The White-Gold Concordat means nothing as far as I'm concerned. Both the empire and Aldmeri dominion know that hostilities will break out again and are just using this peace to build up their forces. When that war does come, it would be better for the Human races to be fully united against the threat the dominion poses to the them. If the empire stays united time doesn't have to be wasted signing treaties and forming alliances.
As for the storm cloaks, I understand the cause that the ordinary soldiers are fighting for, even though I think it will ultimately harm them. However, I can't support Ulfric. Not only because he is using the war to further is own agenda and increase his influence, but because he is directly responsible for Alduin's return. In killing Torygg and starting the war, Ulfric fulfilled an elder scroll's prophecy concerning the return of the dragons. Ulfric is risking the destruction of the entire world over petty religious and political squabbles. Elisif herself says that Torygg probably would have joined with ulfric if he had just asked. instead, Ulfric decided to be an ass and almost doomed everyone else in the process. That is not the sort of person who should be anywhere near the throne.
As for the storm cloaks, I understand the cause that the ordinary soldiers are fighting for, even though I think it will ultimately harm them. However, I can't support Ulfric. Not only because he is using the war to further is own agenda and increase his influence, but because he is directly responsible for Alduin's return. In killing Torygg and starting the war, Ulfric fulfilled an elder scroll's prophecy concerning the return of the dragons. Ulfric is risking the destruction of the entire world over petty religious and political squabbles. Elisif herself says that Torygg probably would have joined with ulfric if he had just asked. instead, Ulfric decided to be an ass and almost doomed everyone else in the process. That is not the sort of person who should be anywhere near the throne.