Board Thread:Lore Discussion/@comment-24256580-20131206011928/@comment-17961408-20140112184830

Since the Argonians are a beast race, that contributes somewhat to their hatred. Also, with the Civil War, the Nords have become distrustful of every other race, not just the Imperials. The Argonians also distrust other races, as early in the First Era, Black Marsh was used as a safe haven for bandits and thugs who tried killing the Argonians.