On the evening of September 2, 2025, the Global Sumud Flotilla—a convoy of around 20 boats carrying 350 activists, including renowned climate campaigner Greta Thunberg and actor Liam Cunningham—finally set sail from Barcelona after a turbulent start. The mission, which organizers have described as the largest attempt yet to break Israel’s longstanding naval blockade of Gaza, is loaded with humanitarian aid and charged with symbolism. Its aim: to deliver food and supplies to the devastated enclave and to open what they call a "people’s humanitarian corridor" to Gaza, which has suffered nearly two years of war and famine.
The journey was not without its setbacks. The flotilla had originally departed Barcelona on September 1, but was forced to return to port early the next morning after stormy weather battered the Spanish coast with winds reaching up to 35 miles per hour (56 kilometers per hour). Organizers from the Global Sumud Flotilla Mission explained in a statement that the decision to delay was made "to avoid risking complications" and to prioritize the safety of the participants—who hail from 44 countries. As the boats finally left port again on September 2, horns blared and activists on the docks chanted, "Free, free Palestine." Thousands of supporters had gathered to wave Palestinian flags and cheer the mission on, according to Reuters and The Times of Israel.
Thunberg, speaking in a video message before departure, declared, "We are sailing again to break the siege and open up a humanitarian corridor." She added, "This is a mission to challenge the extremely violent, business-as-usual international system that is failing to uphold international law." The Swedish campaigner also emphasized the scale of the mission, noting that "more than 26,000 volunteers have signed up to help with the mission." According to Al Jazeera, this is being tracked live as the flotilla makes its way across the Mediterranean.
The mission is set to unfold in two waves: the first departing from Barcelona, and the second scheduled to leave Tunis on September 4. Additional boats are expected to join from Greece, Italy, and Tunisia, with the hope that the entire convoy will rendezvous in the Mediterranean before heading toward Gaza—a journey expected to last about a week. Organizers in Genoa, Italy, reported that 250 metric tons of food had been collected for Gaza, some of which was loaded onto boats departing on August 31, while the remainder would be shipped from Catania, Sicily later in the week.
The stakes are high for those on board. Israel has made clear its intent to stop the flotilla, as it has done in the past. The naval blockade, imposed in 2007 after Hamas seized power in Gaza, is justified by Israel as a necessary measure to prevent weapons smuggling to Hamas, which it considers a terrorist organization. Israel’s foreign ministry has dismissed previous flotilla attempts—including Thunberg’s failed June 2025 voyage—as "media provocations whose sole purpose was to gain publicity." The ministry has insisted, "There are always ways to deliver aid to the Gaza Strip—they do not involve Instagram selfies." In June, Thunberg and her fellow activists were intercepted about 115 miles from Gaza and deported to Paris.
But this time, Israel’s response appears even more severe. According to Israel Hayom, the country's national security minister, Itamar Ben-Gvir, is working on a plan—pending approval from Prime Minister Benjamin Netanyahu—to detain activists in "terrorist-level conditions" at Ktzi’ot and Damon detention centers. The plan also reportedly involves capturing dozens of ships and repurposing them as a "maritime force for police operations." A source close to Ben-Gvir told the paper, "Following several weeks at Kitzi’ot and Damon, they’ll be sorry about the time they arrived here. We must eliminate their appetite for another attempt."
These threats have not deterred the activists, who argue that the world’s governments have failed to pressure Israel to allow adequate humanitarian aid into Gaza. Organizers of the Global Sumud Flotilla Mission have blamed global leaders for inaction, especially after a global hunger monitor declared that parts of Gaza are suffering from famine. Food experts have warned that Gaza City has "fallen into famine," with half a million people across the Strip facing catastrophic levels of hunger. Israel, however, rejects these claims, pointing to the thousands of tons of aid it says have entered Gaza in recent months.
The context for this latest confrontation is grim. The blockade has endured through multiple conflicts, but the current war—sparked by the October 7, 2023, attack in which Hamas militants killed more than 1,200 people and took 251 hostages, according to Israeli figures—has been particularly devastating. Gaza health officials report that over 63,000 people, mostly civilians, have been killed in the enclave since the war began. Israel argues that it seeks to minimize civilian casualties and accuses Hamas of using civilians as human shields by operating from homes, schools, hospitals, and mosques.
The flotilla’s departure also comes at a time when Israel is ramping up its offensive on Gaza City and, as reported by the Associated Press, may slow or halt humanitarian aid to the area as it prepares to capture the densely populated northern city. Critics of the blockade—including many aboard the flotilla—argue that it amounts to collective punishment of Gaza’s roughly 2 million residents. Their demands are clear: safe passage to deliver symbolic aid and the opening of a permanent humanitarian sea corridor.
International opinion on the matter is sharply divided. Recently, the International Association of Genocide Scholars (IAGS) passed a resolution, with 86% of its 500 members voting to recognize Israel’s "policies and actions in Gaza" as acts of genocide under Article II of the 1948 United Nations Convention. Israel’s foreign ministry has condemned this resolution, calling it "entirely based on Hamas’ campaign of lies." There is also an ongoing case at the International Court of Justice in The Hague, which is expected to determine whether Israel’s actions in Gaza constitute genocide.
Meanwhile, the public relations battle appears to be taking its toll on Israel’s global standing. Former President Donald Trump commented to the Daily Caller, "They may be winning the war, but they’re not winning the world of public relations, you know, and it is hurting them." A Pew Poll published earlier this year found that 53% of American adults now hold an unfavorable opinion of Israel, up from 42% in 2022.
As the Global Sumud Flotilla makes its way across the Mediterranean, the world is watching closely. Whether the activists will reach Gaza or be intercepted once again remains uncertain, but their journey has already reignited debate over humanitarian aid, international law, and the ongoing tragedy in Gaza.