England manager Roy Hodgson and Football Association chairman David Bernstein have made an emotional visit to the Yad Vashem Holocaust museum.
During Tuesday's tour they discovered a book written by Jakob Wassermann, a relative of Mr Bernstein, which the Nazis had ordered to be burned.
Mr Bernstein told the FA website: "This is my third time here but it doesn't in any way dull the impact of this place, the extraordinary record of this extraordinary catastrophe that happened before and during the Second World War.
"It records the rise of Naziism in Germany, what happened, how it happened, how it developed, how the policy was setup by the Nazi regime.
"It's important that it's not forgotten and that history must never be allowed to repeat itself."
The FA delegation's visit to the Jerusalem museum followed a similar tour of Auschwitz made by England's Euro 2012 squad in Poland last summer.
Mr Hodgson said the testimonies, videos and pictures they had seen at Yad Vashem were "harrowing".
"The big question you always ask yourself is: how could so many people have allowed it to happen?" he said.
"This must be an incredible burden on the Jewish people to know this has happened."
Mr Bernstein said he was proud that the FA had "done so much to educate people about the Holocaust".