Another demonstrator, Sophia, said this is a reaction of "Palestinians against 75 years of apartheid and brutal repression."
"I think Palestinians are brave to resist, and I hope that they're victorious. This is, you know, the biggest assault on the cities achieved by Israel in the last 75 years, and they have no other means to resist," she said.
Jeff Kevin, a Londoner, said "things will not improve until the Zionists realize that they can't send another 5 million people to the concentration camps. This is ridiculous, and I mean the last 24 hours, with all our politicians only taking the Israeli side. There's a disgrace. You can't lock up 5 million people and expect them to sit there quite happily."
Meanwhile, supporters of both Palestinians and Israelis clashed at a London Underground station, with dozens of police officers attempting to divide demonstrators at High Street Kensington Tube station.
The Gaza-based Palestinian resistance group Hamas launched Operation Al-Aqsa Flood against Israel early Saturday, firing a barrage of rockets. It said the surprise attack was in response to the storming of Al-Aqsa Mosque in occupied East Jerusalem and growing settler violence.
In retaliation, the Israeli army launched Operation Swords of Iron against Hamas in the Gaza Strip.
The number of Palestinians killed by Israeli forces in Gaza has risen to 704, including 143 children and 105 women, the Gaza-based Health Ministry said early Tuesday.
It said the number of wounded has risen to around 4,000.
At least 900 Israelis have been killed and over 2,600 others wounded in the fighting, according to the Israeli Health Ministry.
