Eva Peron was loved by the working classes and despised by the privileged classes, who had exploited and subjugated them. The people who called her what Bonzo3Legs and his wife like to call her, came from those classes.

Juan Peron, it should be noted, supported trade unions and aggressively fought to provide social and economic improvement for the working classes, which got him deposed and exiled, after which the wealthy and privileged dismantled and destroyed as much of what he'd done as they could, and reviled both his name and the name of his much beloved and deceased wife.

Peron returned to Argentina and to power (by proxy, anyway) in the early 70's. He died, and his new wife took power and was almost immediately deposed in a coupe d' etat and replaced by a Military Junta.

The Junta were the ones that instigated the "Dirty War" and gathered up tens of thousands of intellectuals, political opponents, and random bystanders and "disappeared" them, leading to the silent protests by the Madres de Plaza de Mayo.

In case some of you are vague about this, neither Peron nor the Peronists were responsible for the Dirty War, this was the work of the Anti-Peronists who formed the Junta. The Junta, not Peron, are the ones who fit in the shoe box with Pinochet and Duarte and such like.