Nothing is going to erase anti-Semitism, but Jews outside and inside Israel might be a little safer if there was a campaign to distinguish between diverse Jewish positions and the actions of the Israeli state. This is where an international movement can play a crucial role. Already, alliances are being made between globalization activists and Israeli refuseniks, soldiers who refuse to serve their mandatory duty in the occupied territories. And the most powerful images from Saturday’s protests were rabbis walking alongside Palestinians. But more needs to be done. It’s easy for social justice activists to tell themselves that since Jews already have such powerful defenders in Washington and Jerusalem, anti-Semitism is one battle they don’t need to fight. This is a deadly error. It is precisely because anti-Semitism is used by the likes of Mr. Sharon that the fight against it must be reclaimed. When anti-Semitism is no longer treated as Jewish business, to be taken care of by Israel and the Zionist lobby, Mr. Sharon is robbed of his most effective weapon in the indefensible and increasingly brutal occupation. And as an extra bonus, whenever hatred of Jews diminishes, the likes of Jean-Marie Le Pen shrink right down with it.