Supporters of the banned British “direct action network” Palestine Action held a demonstration in central London's Trafalgar Square over the weekend. Around 1,000 people participated. Police arrested 490 participants, who carried placards declaring their support for the illegal group. In London for a few days, I went down to take a look at the gathering.The Palestine Action demonstration took place two days after the terrorist attack at the Heaton Park synagogue in Manchester, on the day of Yom