Stephen Pollard, editor of the Jewish Chronicle, believes that accusations of anti-semitism within the Labour Party will continue as long as Jeremy Corbyn is leader.
At the launch of the Labour Party probe into anti-semitism this week, Corbyn claimed Jews were "no more responsible" for Israel's actions than Muslims are for "those various self-styled Islamic states", causing much offense. He later denied comparing Israel to the Islamic State.
Journalist Pollard believes Corbyn won't apologise for the comments.
"I'm pretty certain he won't apologise for that, but interestingly Emily Thornberry, the Shadow Foreign Secretary, has apologised," he told Julia Hartley-Brewer. "She rang up the Israeli ambassador and offered an unreserved apology.
"You do wonder what kind of world these people live in. They live in their own fantasy world where black is white and white is black.
"He didn't draw a direct comparison between the two, but what he said was just as most Muslims have nothing in common with ISIS, nor do good decent Jews have anything in common with Israel. Now if that's a comparison between the two it's effectively saying a decent Jew can't defend Israel just as a decent Muslim can't defend ISIS.
"This wasn't some slip of the tongue. This is the considered remarks of the leader of the Labour Party at an event about anti-semitism.
"I can't see how under Jeremy Corbyn's leadership there's any possibility of serious action being taken. No one suggests for a second that anti-semitism is rampant in the Labour Party, but what it does have is a problem."
Jewish Labour MP Ruth Smeeth was also accused at the event of being part of a "media conspiracy", and Pollard finds it unacceptable it was allowed to happen.
"Directly in front of Jeremy Corbyn, a Jewish MP, at an event about anti-semitism, is verbally attacked. Frankly even if he'd stood up and said I don't like your hair or something, it would have been outrageous. Jeremy Corbyn didn't tell him to shut up, he just stood there and watched.
"Afterwards as they were going out, he as all pally pally with him."