"I think that when someone wants to deny the Holocaust or think that it is exaggerated, which many of them do and certainly many of their followers do, when they come here and see it, their experience is such that they can no longer think that, " Rabbi Bemporad said.

BBC: Europe

"The main aim is to get Muslims who are leaders all over the world, particularly in the Middle East, to acknowledge the reality of what happened here and to be able to teach it to the people that they lead, " said trip organiser Rabbi Jack Bemporad, who is executive director of the US-based Center for Interreligious Understanding.

BBC: Europe