The Thalmor believe that Mer are superior to Man so what do they think of the Dark Elves of Morrowind ( it is obvious that the Thalmor are using the Khajit and will get rid of them eventually ). What do the Dark Elves think of the Thalmor Morrowind didn't help the Empire in the great war but I remember someone in Skyrim mention that the Dark Elves don't care for the Thalmor. So what do these two think of each other?
The Dunmer probably don't care about the Thalmor. They would only do something if the Thalmor would launch a direct attack against Morrowind.
The Thalmor themselves probably don't like the Dunmer. They generally don't like the "lesser" Mer, such as Bosmer and Dunmer. The Dunmer also worship Daedra, and worshiping daedra is apparently something outlawed in the Summerset Isles.
22.214.171.124 wrote: AngryEnclaveSoldier aren't the wood elves part of the Thalmor so why would the Thalmor think they are lesser mer
The Thalmor are elitists. They think that the Altmer are the purest Mer on Nirn. They hate everything "impure" (Bosmer and Dunmer) and regard them as lesser mer. The Bosmer are part of the Aldmeri Dominion, but they aren't really respected.
The Thalmor probably hate the Dunmer. For one, Morrowind is a province of the Empire. Second, the Dunmer are Daedra worshippers. Third, the Dunmer's Chimer ancestors left the Summerset Isles after a feud with the ancient Altmer, so if the Altmer hold grudges (which wouldn't surprise me) they're likely still bitter over that feud.
I'll elicit a contrary opinion here and say that I think the Thalmor are looking to incorporate Morrowind into the Dominon, maybe by force if necessary but certainly on terms equal to at least the Bosmer. I think they are looking to unite the merish races into a united whole like they were when they were all Aldmer; they want to unify merkind the same way the Empire unified mankind.
Also, we talk about the Thalmor like they're monolithic, but as an organization it seems very likely that within the Thalmor there are probably different factions which range from moderate to radical. There may be some more old-school ESO-style Thalmor who want to see Tamriel ruled by a line of merish rather than mannish emperors and aren't very racist, and of course the newer more jerkish Thalmor who are much more elvish supremacist in their views. Even among the upper echelon of Thalmor who may be conspiring to undo Mundus, there may be those who see this as a form of liberation not only for themselves, but for all souls on Tamriel: men, mer, and beastfolk alike.