Jim,
WAS NOT EXPELLED FOR ANTISEMITISM - THIS IS A TOTAL WITCH-HUNTING DISTORTION - HE WAS EXPELLED FOR CONTRAVENING THE LABOUR PARTY'S RULE 2.1.8 - ABUSIVE BEHAVIOUR

Abusive to who Jim?
Mr Greenstein was accused of three breaches of Labour's rules.
These were; that he said Zionists had collaborated with the Nazis; that he described Zionism as "a Jewish version of anti-semitism"; that he had described the IRA's decision to target Margaret Thatcher as "obviously legitimate."

Dave,
Why are there no serious research results backing up this prediction then?

There has been no serious research on the consequences of the Brexit deal, because the deal has yet to be made.
There was serious research into the consequences of Britain joining EMU and the Eurozone, and they all proved wrong.

The Brexit debate has happened. Brexit will happen. No-one knows the future.