Suspended MP Chris Williamson shouted "don't accuse me of being an antisemite" at a student who had done just that, in a testy exchange at the University of Nottingham.
The Jewish News published a recording of the event - which went ahead last week despite protests from Jewish groups - that reveals Mr Williamson reacted angrily after a student said he was an antisemite and accused him of "trolling the Jewish community endlessly on Twitter" and being "a member of a sewer of racist groups including Palestine Live".
The student received appluse as he asked: "Are you the most unlucky anti-racism campaigner or are you just an outright liar?"
Mr Williamson, who remains suspended from Labour over his repeated interventions in the antisemitism debate, called it an "abusive question".