A series of controversial Israeli films are provoking outrage and plaudits in equal measure at the London Film Festival. The best documentary award has gone to one of the year's most controversial films. Defamation is a polemic by Israeli filmmaker Yoav Shamir. In his expose of America's Anti-Defamation League (ADL), he claims anti-Semitism is being exaggerated for political purposes. He argues that American Jewish leaders travel around the world exploiting the memory of the Holocaust to silence criticism of Israel. He gets inside the ADL, which claims to be the most powerful lobby group of its type anywhere in the world. With unprecedented access, he travels with them as they meet foreign leaders, and use the memory of the Holocaust to further their pro-Israeli agenda. At one point, an ADL leader admits to Shamir that "we need to play on that guilt". Shamir says his film, Defamation, started out as a study of "the political games being played behind the term anti-Semitism". "It became more a film about perceptions and the way Jews and Israelis choose to see themselves and define themselves - a lot of the time unfortunately choosing the role of eternal victims as a way of life." Israel's national psyche He wanted to find out how this mentality has become part of Israel's national psyche. The film suggests that the attitude is thrust upon children from an early age. School trips to concentration camps in Poland run year-round. From just 500 children in the 1980s, he claims around 30,000 are now flown to Europe every year. He discovers that the trips are not designed to educate, but to provoke an emotional reaction. They fly out of Israel euphoric, and end their journey in tears, talking about their shared hatred. They are accompanied by secret service agents who prevent them from talking to any locals - they are led to believe that ormost Poles are anti-Semites. The end result is disturbing. The victim mentality is being used to justify Israel's occupation and colonisation of the West Bank and siege of Gaza. In the film, one Israeli Jew tells Shamir that she refuses to get upset by Israeli aggression against the Palestinians because "we" faced worse. To her, the Holocaust justifies anything the Israeli army does. And for Shamir, that is the real danger. "We are experiencing the most right-wing government we've ever had, and there is very little room for discussion. Putting so much focus on hate and the negative, I don't see it as a healthy thing." In Israel, the film has received a mixed response. "It's kind of a love or hate type of response to the film," Shamir says. "It's very hard to get people to come and watch documentaries in the cinemas in Israel." Touchy subject In the UK, too, there is anger towards Defamation. Mark Gardiner from one of Britain's biggest anti-Semitism campaign groups, the Community Security Trust, believes the film could put Jews at risk. Samuel Maoz's film, Lebanon, has sparked debate inside Israel "All of a sudden some bloke appears out of nowhere, oh he's an Israeli, oh he's a Jew, therefore what he says must have more credence than what organisations like my own and the ADL have said for years - I think that shows a deep-seated bias." And he is furious at the suggestion that anti-Semitism is being used for political purposes. "This assumption that people are saying it because they're being malicious, because they know that it's not anti-Semitic, but hey lets use anti-Semitism in order to win the Israel case, that's what I find really really offensive," Gardiner says.