The allegations are that outlaw bikie gang members were acting as delegates and were involved in government-funded projects. It comes off the back of the Victorian branch’s leader John Setka being expelled from the ALP due to some ugly allegations of domestic abuse.
Maybe someone else would be a better judge on what the source is. I know the UK had a period of more entrenched socialist policies prior to Thatcher that may affect the general population’s perceptions of the movement. The poisonous Murdoch newspaper/media ecosystem can’t help either.