I don't know which march it was, since there are marches every single day and they attract the same sort of people. Maybe it was the one where only 425 people were arrested, about which...
"Smart, who led the policing operation, said: “It is intolerable that those whose job it is to enforce the law and keep people safe – in this case arresting individuals committing offences under the Terrorism Act – should be subject to this level of abuse."
“The tactics deployed by supporters of Palestine Action in their attempt to overwhelm the justice system, as well as the level of violence seen in the crowd, required significant resource which took officers out of neighbourhoods to the detriment of the Londoners who rely on them.”
"The Metropolitan Police condemned the “intolerable” abuse they suffered during the demonstration, during which police said they were “punched, kicked, spat on and had objects thrown at them”.
Sounds all very peaceful.