Hunted by those high elfs in the super awesome armor and with the intense bigotry.
The Thalmor, I believe.
For doing jobs for the Daedra Princes? Why? Daedra are not denizens of hell, and the Thalmor are not the Spanish Inquisition.
The Daedra Princes are more like ancient europe's meddlesome gods.
The Thalmor are zealots of a religion that essentially sees Elves as peers to the lesser Aedra (Magnus, Phynaster etc.) and thus direct subjects (not worshippers) of the eight divines (Aedra - Ancestor-Spirits). The Dunmer (then Chimer) seceded from that culture and (in their search for a higher power to guide their life) turned to the Daedra (non-ancestors) that still actually have godlike-power. Then of course they betrayed the Daedra and started to worship a trio of elves that achieved godhood via technomancy.
From a Thalmor's point of view, worship of Daedra is just a weird quirk for elves, akin to worshipping your grumpy old great uncle. For lesser races it is proper behavior of course. (if they'd just finally start to worship elves as well....)