June 8, 2014 11:21 AM EDT
The way I view it, is if the Thalmor stayed the way it was originally made for, I would have supported it.
However, I go with Imperials due to many factors. If Ulfric wins then the entirety of Skyrim just got weaker both in help from outside countries, i.e. Cyrodiil, and is no longer under the jurisdiction of the Treaty, which means that the Thalmor now can start a war. A small group of Nords cannot take down a treaty that spans many countries, and a heavily powerful army. The Imperials hate the Thalmor just as much as the Nords, and are likely planning to rid themselves of their chains, and if they do not keep Skyrim they will be weaker, meaning that both are open then for invasion.