As a Socialist by nature, I believe in equality, so those who believe themselves superior, be it my own race or another will be highly disliked. Supremacism comes across as arrogance, something I also dislike. Some Altmer may have greater prowess in the fields of magic in comparison with other races, but magic isn't everything, just because some people who are black are exceptionally good at basketball, it doesn't mean every single black person is good at basketball. Hitler claimed that the Aryan race was perfect, and that Blacks were beneath them, he got quite the surprise at the 1936 Berlin Olympics.
I dislike the Thalmor, but I pity the Aldmeri Dominion. The systematic purges by them will have led to normal citizens living in fear (Sources: Legate Fasendil and Malborn) Just south of Lake Inilialta into a cliff face near the unmarked bandit camp that gives 'Treasure Map I' There is a Shrine of Talos with some dead worshippers and a deceased Thalmor, on his person is a note from Elenwen, here is the link
Thalmor Orders - The Elder Scrolls Wiki . Essentially saying that the Thalmor in Skyrim are lacking in resources and personnel greatly, so any propaganda stating they could easily win another war... I have my doubts.
I don't make it my duty to systematically kill every single Thalmor, but if a Judiciar attacks me I won't hold back.