He said: "I will take no lectures from people who attack my credentials as an anti-racism campaigner.
“When I was young man in the 1970s as an apprentice brick-layer on building sites, I risked my personal safety. I nearly got my head kicked in on a few occasions for challenging racists.
“I have the scars to prove it, so don’t come here and accuse me of being an antisemite or a racist. It’s an absolute slur."
Later in the recording, Mr Williamson tries to set out his reasoning as to why Labour is not a racist party, saying: "I you are a screaming racist or an antisemite, why would you join a party with a tradition of fighting racism?
"Surely you'd be far better off joining a fascist party like the British National Party or one of those sort of organisations.
"So I think the Labour Party has been smeared."
Mr Williamson adds he has defended people "falsely accused" including Jackie Walker, the Labour activist who was expelled over her comments about Jewish people's role in the slave trade and Holocaust Memorial Day.
Mr Williamson's legal challenge to his suspension from Labour failed this week, as the High Court found the discplinary action he faces should continue.
