Originally Posted by
Soon-TM
Indeed, they swore the blood oath to Thrall's Horde. But Sylvanas's Horde is almost a complete perversion of Thrall's, so it follows that they wouldn't be betraying their oath if they rose against Sylvanas to reinstate Thrall, or anyone sane indeed, in her lieu. Blood elves had also sworn loyalty to the Alliance, but after having to endure an asshole such as Garithos, they started dealings with the Horde... so it isn't as if there are no precedents. As a matter of fact, Tauren rebelled against Garrosh, even if he had been appointed by Thrall himself.