Rag,
How can you equate one person saying "And the vested interest of the members of that board" to someone saying "those Jews"

Because thes are the groups that comprise the board.
All Jewish except the first one.

INTER-PARLIAMENTARY COALITION FOR COMBATING ANTISEMITISM        

EUROPEAN JEWISH CONGRESS

B'NAI BRITH INTERNATIONAL        

CEJI – A JEWISH CONTRIBUTION TO AN INCLUSIVE EUROPE

Richard said,
"And the vested interest of the members of that board is that the the wider the definition of antisemitism, the more influence they can gain."

What vested interest could the non-Jewish group have?
None.
He was accusing those Jewish groups of using the board to increase Jewish influence.