now how in the world did u come to this conclusion...
the nords werent exactly nice to the elves but people still like them...
By reading the lore about them written by other high elves. The Thalmor were a mintority extremist political party that used a time of crisis and turmoil to sieze control of their homeland which they hold in the grips of totalitarian rule. They have proclaimed themselves saviors of the elven races and, according to one Thalmor you meet in the game, beleive it is their destiny as the superior race to rule over all things. It's not a stretch to see how in the world could I have possibly come to conclusion that they may be allegorical of similar fascist-sounding regimes in real world history.
The ancient nords were pretty nasty and some of the factions in present day skyrim could have similar comparisons drawn. The Thalmor are acting much like the ancient Aldmeri dominion the nords are not exactly acting much like the ancient nords. Some nords are quite disgustingly racist, just as some high elves in the game are. Not all high elves are Thalmor as they are a political party and religious order not the entire race - a powerful minority in fact.
People seem to conflate Thalmor with Aldmeri - they are not one in the same. The Psijic Order is mostly composed of Aldmeri and their opposition to the Thalmor and the Thalmor purges (exiled or killed outspoken dissedents in great numbers) is beleived to have prompted their taking of one of the largest of the Aldmeri home islands.