WASHINGTON - Threats of demonstrations by human rights activists and legal action against ex-President George W Bush over allegations that he sanctioned the torture of terrorism suspects led the former US leader to call off a Jewish group-sponsored speaking engagement in Geneva, Switzerland, organizers said. Bush was scheduled to speak at a dinner Feb 12 to honour the United Israel Appeal (UIA), but decided the risk of public violence was too high, The Washington Post reported Sunday. Several European rights groups and the Center for Constitutional Rights in New York said they would organize demonstrations to protest Bush's alleged endorsement of torture of terror suspects. A UIA lawyer, Robert Equey, told the French newspaper Tribune de Geneve Bush was concerned for public safety. "The calls to demonstrate were sliding into dangerous terrain," Equey said. The rights groups also said they were also petitioning Swiss prosecutors to file criminal charges against Bush and prepared a 2,500-page volume of torture allegations they plan to release Monday, the Post said. The groups previously filed similar charges against former U.S. Defence Secretary Donald Rumsfeld and other officials from the Bush administration in Germany and France, but courts dismissed them.