Question: are all high elves thalmor?
Answer: There's only a handful of them, and they lurk in the shadows back in Alinor. Not all Altmer are Thalmor, but all Thalmor are Altmer. There are a few Khajiit agents, as well as a Nord informant. ... Thalmor mages were attacking the Altmer dissidents who were resisting with magic of their own.