But, that hates soo much their governement that creates an terrorist faction to atack their own governement. That i would like to see in a Thalmor DLC.
First of all, comparing anything in TES with the real world is over simplifying things, so please don't. More to the point, there re probably Altmer who hate the Thalmor, there are probably those that actively oppose them... To the point of actually open rebellion? I don't think so, not yet at least. But who knows what can come.
You also have to remember that the Thalmor for the last 200 years (give or take a few) have been racial cleansing their own population, killing those that oppose them inside of Summerset and even the entire dominion... It is very likely that a great deal of the Altmer who are still around, are indoctrined by this behaviour. So the question is, are all of them? No, most of them? Probably.