-They sold their own into slavery, http://www.uesp.net/wiki/Lore:Argonian
-Stole ancient Dunmer Lands which the Dunmer didn't even take back from the Argonians after winning the Arnesian War. http://www.uesp.net/...ore:Black_Marsh
-They are controlled by nazi/hippy-like (Never thought that comparison could be made but it sticks) trees known as the Hist. And nowhere does it state the Dunmer actually cut down Hist trees that I am aware of. Correct me if I am wrong. This http://uesp.net/wiki/Lore:The_Seed is full of BS and can hardly be credible.
-The Hist held prior knowledge of the Oblivion Crisis and didn't see fit to share it with the rest of the races thus resulting in many preventable deaths. Also risking all of Nirn. The Argonians knew and could have shared it but were selfish and only had their own selfish aims in mind. http://www.uesp.net/wiki/Lore:Hist
-They took advantage of that knowledge to make themselves stronger and then invaded a battered and weakened Morrowind.
-They clearly invaded for revenge and instigated an attempted genocide. Against a people who had been under the thumb of traditions and the Tribunal and just had fought a Bloody Civil War between house Hlaalu and Dres against the Houses of Redoran and Indoril to abolish slavery. Spilling Dunmer blood for the sake of Argonians.
-They truly lived up to the Dunmeri view of them.
So yeah, even though some of their actions are kind of understandable. They are NOT in the right. And they certainly committed incredible atrocities. Much worse than anything the Dunmer have ever done. If not for the CoC the world would be under Mehrunes Dagons thumb because of the Argonians and the Hist. They risked all of Nirn for selfish gain. It seems the Dunmer were correct and they really are scum. But that is just my opinion based off of facts.
What are yours?