Who says that there there were 30,000 deaths? Where is the list of the names? actually there is none. It was a number taken out of the hat by the late Nestor K , starting during his term as president. And he was a notorios liar. He used the Goebbels technique where a lie repeated many times becames the truth.
Actually, the only AD HOC commision organized by president Raul Alfonsín listed a little more than 8,000 deaths. And nobody mentions the 1500+ victims of the Montoneros and the ERP terrorists.