Israeli President Isaac Herzog walks near the Portuguese Synagogue on the day of the opening of the National Holocaust Museum, in Amsterdam, Netherlands, March 10, 2024. Photo: REUTERS/Piroschka van de Wouw

Israeli President Isaac Herzog, attending an opening of a Holocaust museum in Amsterdam on Sunday, called for prayers for peace and the immediate release of hostages taken by Hamas in its Oct. 7 attack and still held by the Islamist militants.

As he arrived at the Portuguese Synagogue to make a speech, Herzog was greeted with booing from pro-Palestinian protesters demanding an immediate end to Israel’s assault in Gaza.

Israel launched its military offensive in Gaza after Palestinian terrorists led by Hamas invaded southern Israel on Oct. 7, murdering 1,200 people and kidnapping 253 others as hostages. Over 130 of the abductees remain hostages in Gaza.

“Hatred and antisemitism are flourishing worldwide, and we must fight it together,” Herzog said in his speech.

At a square nearby, protesters were chanting “Ceasefire now” and “Stop bombing children,” while holding Palestinian flags and signs that said “Jews against genocide” and “The grandchild of a holocaust survivor says: Stop Gaza Holocaust.”

Some set off fireworks and threw eggs at police while a few tried to climb police vans as the protest grew more tense in the afternoon. Local media reported at least a thousand protesters attended.

“(Herzog attending) is a slap in the face of victims both in Gaza and the Jews that starved in World War Two,” protester Huibert Boer said.

Near the new museum, a group of people holding Israeli flags and pictures of hostages was confronted by some of the pro-Palestinian protesters, some shouting “shame on you,” with police officers present to de-escalate tensions.

Human rights group Amnesty International put up detour signs around the museum to direct Herzog to the International Court of Justice (ICJ) in The Hague.

A spokesperson for the president declined comment.

Dutch Jewish anti-Zionist organization Erev Rave, which organized the protest with the Dutch Palestinian Community and Socialists International, said that while it honored the memory of Holocaust victims, it could not stand by while the war in Gaza continued.

Faced with international concerns about the heavy humanitarian toll of the war, Israel has been stressing that it did not start it and was doing everything possible to minimize civilian casualties, blaming Hamas for fighting in densely populated areas.

Herzog‘s remarks that not only militants but “an entire nation” was responsible for the Oct. 7 attack and that Israel will fight “until we break their backbone” have been cited by South Africa in its International Court of Justice lawsuit against Israel.

But Herzog has said his comments were misrepresented, and only part of what he said was cited in order to build a case against Israel in the ICJ.

Before he became president, a largely ceremonial role, Herzog used to head Israel’s Labor party, which historically has advocated for making peace with Palestinians.

The museum told media that it had invited Herzog before the Hamas attack and Israel’s subsequent offensive in Gaza.

It said in a statement it recognized that the president’s attendance raised questions but that he represented the homeland of Dutch Holocaust survivors who emigrated to Israel.

Nazi Germany killed six million Jews during World War Two. Modern Israel was founded in 1948 as a safe haven for Jews.

Dutch King Willem-Alexander is set to meet Herzog later on Sunday.