User blog comment:Jimeee/Elder Scrolls Online: Introduction to the Lore/@comment-4553238-20120824204928/@comment-30303790-20120824221627

Well I think the Dunmer might have more against because of their culture. The Worm Cult's necromancy is more likely much closer to (if not out right) desecration than the hallowed traditions of Dunmer, so tension could easily come from that.

As far as timeline though, I know to little to pin point of any possible conflicts.