Marcher Limor Son Har-Melech, a lawmaker from Ben Gvir's far-right Otzma Yehudit (Jewish Power) party, toldThe Times of Israel that she was participating to celebrate "our victory over the Arabs."
In Gaza, Israeli forces used live and "less lethal" munitions to break up a Palestinian demonstration that took place along the besieged strip's border with Israel, according to Al Jazeera.
"We will not surrender and we will continue to demand our rights and defend our occupied lands and our sanctities in Jerusalem," Palestinian protester Osama Abu Qamar told the Qatar-based news network.
The Jerusalem-based NGO Ir Amim called the Israeli demonstrations a "display of incitement, Jewish dominance, and racism."
Israeli marchers threw rocks at journalists, hitting at least two reporters in the head and wounding them, Middle East Eye reports.
Middle East Eye said that marchers in Jerusalem's Old City beat Palestinian residents, and when Israeli police intervened, they assaulted Palestinian victims under attack instead of protecting them.
March participants stormed the Al-Aqsa Mosque—one of the holiest sites to both Muslims and Jews—and insulted the prophet Mohammed, who Muslims believe was the messenger of God.
Ofer Cassif, an Israeli lawmaker from the left-wing Hadash coalition, called the flag march a "violent parade presented as a joyous dance."
"Rioting gangs backed by Ben-Gvir and the fascist government are bullying Arabs to show them who's in charge, "Cassif told Haaretz. "This is disgusting Kahanism in its peak."
Cassif was referring to the Jewish supremacist movement once led by Meir Kahane, the Orthodox rabbi convicted of terrorism before being assassinated in 1990. Ben-Gvir was convicted in 2007 of incitement to racism and supporting the Kahanist terror group Kach after he advocated the ethnic cleansing of Palestinians.
There were other Israeli marches in cities and towns including Lod—known to Palestinians as Lydda—site of a 1948 massacre and death march as Jewish militias seized control of the area.
Thursday's marches came three days after, and stood in stark contrast with, Palestinians' commemoration of Nakba Day, a remembrance of the ethnic cleansing of more than 750,000 Arabs from over 400 villages—sometimes by massacres—during the foundation of the modern Israeli state in 1948. For the first time ever, the United Nations officially commemorated the Nakba.