Antisemitism has always existed within the extremes left and right of the political spectrum.
It was communists who authored the conspiracy theorem tat underpins ‘The Elders of Zion’ a conspiracy theory that has taken root in both political extremes and frequently turns up in discussions on this forum.
So yes, I would agree, Corbin played to these antisemite memes and attracted antisemites to the Labour Party.
He’s gone and so are his followers.
Keir Starmer is the leader of the Labour Party and he has made clear statements and actions to root out antisemitism, his swift action to remove the whip from Abbott is an example.