I'm talking about the definition of the word treason. Considering citizens of the horde & alliance swear fealty to a head of state, and a head of state can't commit treason against itself, therefor Lorethemar cannot commit treason. When Garrosh was overthrown it was for other crimes, not "treason."
As for example I did use Alleria's brain melting technique as a form of "advanced interrogation." Capital punishment used by Alleria, justified against someone suspected of a crime. Beyond that I can simply give the example that a member of the Alliance killing a Blood elf is not a crime, in the eyes of the Alliance. Logically, there's no real rule why a nation couldn't be in both the horde & alliance, but as soon as Silvermoon joined the Horde they were considered fair game.
The Alliance is not morally superior here.