The Salvadoran Option

Reports indicate that the Pentagon has decided to implement the "Salvadoran Option" in Iraq. That's a reference to what were called death squads or escuadrones de la muerte about 20 years ago in Latin America. They were principally extreme right-wing groups who went around assasinating left-wing guerrillas. At the time many people accused the US of supporting the death squads, which we strenuously denied. I wonder if this is a kind of indirect admission to our involvement back then? As I remember, the death squad effort was not one that met with great success. So, why would they think it would work now?