Pete, the accusations come from within Labour.
I posted this from BBC earlier,
"Adam Langleben, one of the Labour councillors who lost their seat in Barnet, said allegations of anti-Semitism was the key reason for the party's losses in London.
He told BBC Radio 4's Today programme: "I spent countless hours knocking on countless doors speaking to Jewish voters who are Labour voters or were Labour voters - people who genuinely believe in the same values as the Labour Party, who agreed with our local manifesto for Barnet.
"But they could not vote for a Labour Party that they see as hostile or dangerous to the Jewish community.
"And the Labour Party is seen by far too many people in the Jewish community as being racist right now." "
http://www.bbc.co.uk/news/uk-england-london-44001786

how do you feel about your fellow british citizens being detained, bullied and deported and treated abominally for years - aren't you ashamed?

Yes, it was shameful, but can not say that any one party was to blame or that any party intended it.