The actor noted that he was impressed with Berger, who challenged Jew-hatred before leaving Jeremy Corbyn's party and deeming it "institutionally antisemitic".
Jeremy Corbyn has said he is "very sorry" for "everything that has happened" regarding the way the Labour Party has dealt with allegations of antisemitism.
Asked whether Israel has a right to exist, the Labour leader said: "Yes".
May's response to Etchingham's question about her naughtiest moment drew widespread derision and imitation in memes.
In an interview with ITV's This Morning, the Labour leader was repeatedly asked to apologise to the Jewish community for any anti-Semitism by party members.
Mr McDonnell has said he would do the same with Number 11 Downing Street if he becomes chancellor.
US President Donald Trump (R) shakes hands with NATO Secretary General Jens Stoltenberg (L) as Britain's Prime Minister Boris Johnson (C) looks on during the NATO summit at the Grove hotel in Watford, northeast of London, December 4, 2019. Obviously I am very sorry for everything that has happened, but I want to make this clear - I am dealing with it, I have dealt with it. "Antisemitism is a vile evil in our society. I am not a racist, in any form - I've spent my life opposing racism", he told the programme.
"And, I think the treatment of Jewish people that suffer from anti-Semitism is appalling".
Mr Corbyn was asked if he sits down with his family to watch the monarch's annual 3pm address, but failed to give a clear answer when pressed eventually saying "There is lots".
After Etchingham pointed out that it was actually broadcast in the afternoon and accused the Labour leader of not watching it, he said: "There is lots ..." I enjoy the presence of my family and friends around Christmas.
The Labour leader also revealed that he usually visits a homeless shelter on Christmas Day.