Lidia Thorpe, 'Posie Parker' and the neo-Nazis

You've probably seen the clip by now of Senator Lidia Thorpe being thrown to the ground by police outside Parliament House in Canberra.  She was trying to confront a British anti-trans-rights campaigner, Kelly-Jay Keen-Minshull, known online as 'Posie Parker', whose tour of Australia this week has attracted support from neo-Nazis, including at a rally in Melbourne.  It's raising concerns about the growth of extremist groups in Australia.  So what's fuelling it?  Today, we speak with an expert on conspiracies and the far-right.  Featured:  Dr Kaz Ross, independent researcher