The Dunmer are invaders in Argonian land. It is the the Dunmer who do not belong sat upon the Nix Oxes and in time will kill them off by their abusive natures. Don't worry though after Mehrunes invades the Argonians will finally have the resolve to take back their land. Hopefully the Dunmer will then learn humility but it is doubtful and will likely die out like every other vile and precocious elven race that came and went before them (Left Handed Elves, Dwemer, Ayleids). The Dunmer are destined for failure and because of their pride keep poking the bear. Good luck with that.
For now... Neloth states (in Dragonborn) that House Telvanni still has holdings in Vvardenfell, and I doubt Port Telvannis was touched. I couldn't care less if the other houses crumble. They are all N'wah-loving S'wits anyways.