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.

[5][6] Juan Carlos Blumberg claimed he wanted justice for his son's murderers, but even more importantly, a working system to ensure that such crimes stopped being common and that criminals were punished.

The legislators swiftly passed amendments to the penal laws as requested, which was later criticized as simply pandering to public opinion and introducing unsystematic changes for media effect only.

[8] 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".

He has been courted by Mauricio Macri of the centre-right Commitment to Change party, possibly as a candidate to be governor of Buenos Aires Province for the PRO alliance.

Government official and piquetero leader Luis D'Elía organized a "counter-march" and accused Blumberg of "using the pain of his son's death as a step" for political advance.

He also noted the presence, in Blumberg's march, of people linked to the last dictatorship (notably retired Gen. Eduardo Cabanillas, Lt. Col. Emilio Nanni, and pro-military activist Cecilia Pando).

Nobel Peace Prize Adolfo Pérez Esquivel organized a parallel protest to denounce the "criminalization of poverty" that allegedly underlies Blumberg's demands, but refused to appear next to D'Elía and later called him "a speculator".