After gunfire erupted outside a humanitarian aid event for Gaza at the Capital Jewish Museum in Washington late Wednesday, Yoni Kalin and his wife, JoJo, watched as museum security rushed attendees away from the doors and others who had just left came tumbling back in.

Among those who came in, Kalin said, was a man who appeared agitated, who Kalin and others in the museum first took for a protester, and who “walked right up” to police the moment they arrived, Kalin said.

“‘I did this for Gaza. Free Palestine,’” Kalin recalled the man telling the officers in an interview with The Times Thursday. “He went into his, ‘Free Palestine. There’s only one solution. Intifada revolution’ — you know, the usual chants.”

Kalin, a 31-year-old Washington, D.C., resident who works in biotech, said he still had no idea that two Israeli Embassy employees had been fatally shot outside. So when police started to pull the man away and he dropped a red kaffiyeh, or traditional Arab headdress, Kalin picked it up and tried to return it to him, he said.

The event that night — which Kalin’s wife had helped organize with the American Jewish Committee and the humanitarian aid groups Multifaith Alliance and IsraAID — had been “all about bridge building and humanitarian aid and support,” Kalin said, and he figured returning a protester’s kaffiyeh was in line with that ethos.

“I regret that now,” Kalin said Thursday morning, after a nearly restless night. “I regret touching it.”

Like so many other mourners across the nation, Kalin said he was having a hard time processing the “surreal, horrific” attack, and its occurring at an event aimed at boosting collaboration and understanding between Israelis, Palestinians and Americans.

“I don’t think him shouting ‘Free Palestine’ or ‘Free Gaza’ is going to actually help Palestinians or Gazans in this situation, especially given that he murdered people that are actually trying to help on the ground or contribute to these aid efforts,” Kalin said of the shooter. “It’s a really sick irony.”

Israeli officials identified the two victims as employees of the Israeli Embassy in Washington. Israeli Foreign Minister Gideon Saar said Yaron Lischinsky was an Israeli citizen and research assistant, and Sarah Milgrim was a U.S. citizen who organized visits and missions to Israel. Israeli Ambassador to the U.S. Yechiel Leiter said the two were a couple, and that Lischinsky had recently purchased a ring and planned to propose to Milgrim next week in Jerusalem.

U.S. authorities called the shooting an “act of terror” and identified the suspect as Elias Rodriguez, 31, of Chicago. Metropolitan Police Chief Pamela Smith said Rodriguez was seen pacing outside the museum before the shooting, and was later detained by security after walking inside.

Dan Bongino, deputy director of the FBI, said the agency was “aware of certain writings allegedly authored by the suspect, and we hope to have updates as to the authenticity very soon.” He said Rodriguez had been interviewed by law enforcement early Thursday morning, and that the FBI did not believe there was any ongoing threat to the public.

President Trump, who spoke with Israeli Prime Minister Benjamin Netanyahu on Thursday, and U.S. Atty. Gen. Pam Bondi have both promised justice in the shooting.

“These horrible D.C. killings, based obviously on antisemitism, must end, NOW!” Trump posted on social media. “Hatred and Radicalism have no place in the USA.”

Israel Bachar, Israel’s consul general for the U.S. Pacific Southwest, based in Los Angeles, said security has been increased at consul facilities and at other Jewish institutions, with the help of American law enforcement and local police.

The shooting comes amid Israel’s latest major offensive in the Gaza Strip in a war since Oct. 7, 2023, when Israel was attacked by the Palestinian militant group Hamas.

The attack, launched from Gaza, killed 1,200 people, while Hamas claimed about 250 hostages. Israel’s response has devastated Gaza and killed more than 53,000 people, mostly women and children, according to local health authorities.

U.S. Atty. Gen. Pam Bondi visits the site of the shooting outside the Capital Jewish Museum on Thursday.

(Tasos Katopodis / Getty Images)

About 90% of the territory’s roughly 2 million population has been displaced. Much of urban Gaza has been bombed out and destroyed, and Israel has blocked huge amounts of aid from entering the territory, sparking a massive hunger crisis. Protests of Israel’s actions have spread around the world and in the U.S., which is a major arms supplier to Israel.

Brian Levin, founder of the Center for the Study of Hate and Extremism at Cal State San Bernardino, said that for decades, antisemitic and anti-Muslim attacks have increased in the U.S. when conflicts arise in the Middle East — and Israel’s current war is no exception.

“With the worst conflict the region has seen in years, with a horrifying loss of life and moving images of the suffering taking place in Gaza, what ends up happening is the soil gets soft for antisemitism,” Levin said.

In recent years especially, the spread of such imagery — and of misinformation — on social media has produced “a rabbit-hole where people can get increasingly radicalized,” and where calls for retribution against anyone even tangentially connected to a disfavored group can drown out messages for peace, compassion and aid, Levin said.

“We have unfortunately been caught in a time when the peaceful interfaith voices have been washed over like a tsunami, leaving a vacuum that allows conflict overseas to generate bigotry and violence here,” he said. “We see that again and again — we saw that with 9/11 — where communities become stereotyped and broad-brushed and labeled in certain niches as legitimate target for aggression, and that feeds upon itself like a fire, where you end up having totally innocent people being murdered.”

Several organizations have described Lischinsky and Milgrim as being committed to peace and humanitarian aid work. Kalin said many of the people at the museum event were — and will continue to be.

“This act of violence just makes me want to build bridges even stronger. I think we need to strengthen the coalition. We need more Muslims, we need more Christians, we need more Israelis, we need more Palestinians,” Kalin said. “We need people that believe that peace is the answer — and that hate and violence isn’t going to solve this issue.”