The protesters are opposed to sending aid into Gaza, saying it strengthens Hamas and reduces the pressure on the militants to release scores of hostages abducted in the October 7 attack that ignited the war.
Around 600,000 Palestinians have been driven out of Rafah since the beginning of last week, the UN said.
Some 80 percent of Gaza’s population of 2.3 million Palestinians have fled their homes since the start of the war, with many relocating multiple times.
Israel opened a second crossing into the north and took other steps to facilitate aid under heavy pressure from the United States after an Israeli strike killed seven workers with the World Central Kitchen charity last month.