Mr Foster, who lost eight members of his family in the Holocaust, made the comments
after losing his High Court battle to prevent Mr Corbyn running in the Labour leadership contest without first gaining the support of the party’s MPs.
The court had handed a victory to “Corbyn and his Sturm Abteilung (stormtroopers)", he said.
But he welcomed Friday’s Appeal Court decision to allow Labour’s National Executive Committee to block 130,000 new party members from voting in the leadership contest as a triumph for democracy.
Mr Foster, who ran as a Labour candidate in the 2015 general election, said Owen Smith, Mr Corbyn’s rival for the leadership, had a real chance of winning September’s vote. Should he do so, it would spell the end for the hard left “bullies”, he believed.