Colombia’s president, Gustavo Petro, triggered yet another diplomatic rupture in South America on Sunday after denouncing Chile’s president-elect, José Antonio Kast, as a “Nazi,” rejecting the legitimacy of Chile’s democratic choice and sharply diverging from the cautious language typically observed between regional leaders.
Petro’s remarks came within hours of Kast’s decisive victory in Chile’s presidential runoff, in which the conservative candidate secured more than 58 per cent of the vote, defeating hard-left contender Jeannette Jara. Jara conceded promptly, saying that “democracy has spoken loud and clear” and wishing Kast success “for the good of Chile.”
Petro, however, used his social media platform X to frame Kast’s victory as evidence of an advancing wave of fascism in Latin America. “Fascism advances. I will never shake hands with a Nazi or a Nazi’s son, nor will I; they are death in human form,” the Colombian president wrote.
In a retort that called for Chileans to “take care of Neruda’s tomb,” Petro went on to equate Kast’s electoral mandate with the legacy of former dictator Augusto Pinochet. “It’s sad that Pinochet had to impose himself by force, but sadder now is that the people choose their Pinochet: elected or not, they are sons of Hitler and Hitler kills the people,” Petro said, adding that Latin Americans “know how to resist.”
The language marked one of the most explicit attacks by a sitting South American president on a democratically elected counterpart in recent years and raised immediate concerns about the state of Colombia – Chile relations, historically among the region’s most stable.
Kast’s victory completes a broader rightward shift in South American politics, following the election of Javier Milei in Argentina, Daniel Noboa in Ecuador and Nayib Bukele in El Salvador, while Bolivia recently ended nearly two decades of socialist rule with the election of centrist Rodrigo Paz. Petro, the region’s most unhinged left-wing leader, with just eight months remaining in his presidential term, appeared to ignore the potential diplomatic fallout of his remarks.
Within hours of Petro’s statement, US Republican Congressman Carlos Gimenez responded sharply, writing: “This guy (Petro) went too far with the drugs and alcohol. This is the real Gustavo Petro: incoherent, hateful, and schizophrenic.”
Former Colombian president Álvaro Uribe Vélez praised Chile’s electoral process and congratulated Kast, saying the vote had taken place peacefully and reflected citizens’ concerns about security and institutional stability. Uribe described Kast as “a guarantee for democratic institutions” in Chile and the wider region.
Another former president, conservative Andrés Pastrana, issued a sharply worded rebuke of Petro, saying the comments were “inappropriate and irresponsible” and did not represent Colombians nor the long-standing spirit of cooperation between Bogotá and Santiago.
Criticism also came from current lawmakers. Federico Hoyos, a congressman from the department of Antioquia, said Petro had “abandoned his role as head of state” and was acting instead as an “ideological agitator “unwilling to engage with leaders who do not share his views. Andrés Forero, a House representative from the opposition Centro Democrático party, accused Petro of disrespecting the sovereign will of Chilean voters, telling Colombians: “Let’s not fool ourselves, Petro is not a democrat.”
While Petro reviles diplomacy, Kast received public congratulations from international figures across the hemisphere. María Corina Machado, Venezuela’ opposition leader and 2025 Nobel Peace Prize Laureate, praised Chile’s election as “an extraordinary electoral day, an example for many nations of Latin America and the world.”
Addressing Kast directly, Machado wrote: “To the president-elect of Chile, José Antonio Kast, I send my affection and congratulations for the trust he has received. In the name of the Venezuelans, I wish him great success in his government.” She added that Venezuelans hoped to count on Kast’s support “to ensure an orderly transition to democracy in Venezuela” and to help build “a safe, prosperous and free hemisphere.”
Machado’s intervention was notable given her continued persecution by the regime of Nicolás Maduro and her public appearance at the Nobel ceremony last week in Oslo, her first in more than a year.
The United States also welcomed Kast’s victory. Secretary of State Marco Rubio said Washington looked forward to working with the incoming administration “to strengthen regional security and revitalise our trade relationship.”
Kast’s transition team said the president-elect would travel to Argentina this week to meet President Javier Milei, signalling an intention to align closely with like-minded governments in the region.
For Petro, the episode reinforces international perceptions that he has become an anachronism of regional politics — reliant on social-media provocation and historical revisionism.
For all the historical accuracy that seems to elude Petro, membership in Adolf Hitler’s National Socialist Party was not voluntary. While many Germans joined out of conviction, others were pressured or effectively compelled to enrol, particularly to obtain employment, documentation or travel permits. During and immediately after the Second World War, Germans seeking to live or work abroad — including in South America — were often required to disclose or document prior party affiliation to secure passports and legal work status, complicating later assessments of individual responsibility.
Michael Kast, born in 1924 in Thalkirschdorf, Bavaria, emigrated in Chile in 1946. His youngest son, José Antonio Kast (born 1966, Santiago) has repeatedly claimed his father was a Third Reich conscript.
Whether the outburst leads to lasting diplomatic consequences remains uncertain. But it has underscored how electoral change in Latin America is now accompanied not only by sharp policy shifts, but by open rhetorical conflict by a Colombian leader increasingly isolated among his regional peers, except for one ally, Venezuelan dictator Nicolás Maduro.
On Monday afternoon, Chile’s Minister of the Interior, Álvaro Elizalde, confirmed that a Letter of Protest will be sent to President Petro, stating in no uncertain terms that: “A decision has been made to uphold the point of view that has to do with Chilean democracy. Ultimately, the people of Chile decide, and we all have to respect that outcome”.
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