The government organized a
demonstration at the
Plaza de Mayo on May 1, 1974, during celebrations of
International Workers' Day. There were members of both the Montoneros and the
CGT union.
Isabel Perón, wife of Juan Perón, was repeatedly insulted by the Montoneros, who preferred his first wife, the late
Eva Perón. Perón forbade the use of partisan flags, but Montoneros ignored the prohibition: they hid their flags within their drums, and headed to the plaza carrying national flags. Thus, the police allowed them to pass, and they later unveiled and used Montonero flags. When Perón showed up at the balcony of the
Casa Rosada, he was enraged with the Montoneros, both for the murder of Rucci some months ago, and by the insults to his wife and the use of flags despite his instructions. Montoneros and syndicalists confronted each other with demonstrative songs. Perón started by praising the role of the syndicalists, which motivated stronger songs of rejection from Montoneros. Perón insisted in supporting the syndicalists for their twenty-year-long fight during the Peronist proscription, and contrasted them with "
those stupids that scream". Further songs from the Montoneros did not allow him to continue talking. Even more enraged by the interruption, he added that "
...and now it happens that some callows, pretend to have more merits than those who fought during twenty years. For that reason, partners, I want to honor those organizations and those wise and prudent leaders who had kept their forces, and who saw their leaders murdered, still without the thundering punishment". With this comment, Perón blamed Montoneros directly for the murder of Rucci. Montoneros, however, manifested that they were proud of Rucci's assassination, singing "
Rucci, traitor, greetings to Vandor" (a song referencing
Augusto Vandor, another unionist leader killed by militant organizations). At that point, Montoneros began to leave the plaza, with Perón still talking. Some newspapers of the time estimate that half of the people present left the plaza, others, that it was a third. This unprecedented situation forced Perón to make a shorter speech, and end the demonstration earlier. ==Consequences==