She said: “We can see how swiftly antisemitism has spread through contemporary European politics.
"The Labour Party, which over the course of its long history was a bastion of political reason, has under the leadership of Jeremy Corbyn turned into one of Europe’s most blatant problem cases of political antisemitism.”
Ms Knobloch, who lost several members of her family in the concentration camp at Theresienst, said it was worrying that Jews were starting to feel threatened again.
Last week, she said Germany’s far right AfD’s politics were based on “hatred and exclusion” as she spoke at a Holocaust Remembrance Day commemoration in the Bavarian state parliament.
During her speech, AfD members left in protest.