Axel Blumberg

Blumberg was born in Avellaneda, Buenos Aires, in a Jewish family of German and Lithuanian background. He enrolled at the National Technological University and pursued a degree in textile engineering, though he reportedly left in 1966 to pursue an interest in traditional Lithuanian dancing. Blumberg publicly referred to himself as an "engineer" graduate of Reutlingen University (Germany), although a journalistic investigation revealed on 15 June 2007 that this claim was false.

Though he presented himself as an engineer, doubts arose in June 2007 about the validity of his degree. and he finally admitted to holding no university title.

Blumberg led a new march on August 31, 2006, at the Plaza de Mayo. While the organizers estimated an attendance of 300,000 people, the media and police estimates ranged from 35,000 to 60,000, mostly middle-class residents of Buenos Aires. Although Blumberg explicitly stated that march did not a political end, he was accompanied by Mauricio Macri and Ricardo López Murphy, among other right-wing political leaders, as well as by a group of opposition piqueteros led by Raúl Castells. Blumberg repeated his demands of harder penal laws and lowering the age of criminal responsibility, and called for the rejection of the Argentine Penal Code reform project.

When he attended a support demonstration for the people killed in the fire of the República Cromagnon disco, he found a hostile reception, including shouts accusing him of being "a Nazi and a fascist". A demonstration organized by Blumberg on March 23, 2005, was only attended by about one thousand people.

Blumberg lost his son Axel Blumberg, an engineering student, after a kidnapping resulted in the latter's murder on March 22, 2004. Argentina was at the time in the midst of a wave of extortion kidnappings, often remaining unsolved after badly conducted investigations; in three cases since 2001, the extortive kidnappings ended in murder: Juan Manuel Canillas, who was killed by his kidnappers in July 2002, Diego Peralta, in August of the same year, and the aforementioned Axel Blumberg, in March 2004.

Juan Carlos Blumberg (born in 1945) is an Argentine textile entrepreneur and victims' rights advocate who rose to prominence following the 2004 murder of his son, Axel Blumberg.