What if the Port Arthur massacre was committed by an Aboriginal Australian instead of Martin Bryant? 1996 was a year that saw Pauline Hanson disendorsed by the Liberals shortly before the elections, but she still ascended to the House on Liberal merits as an Independent. Pauline Hanson was disendored due to her statements on Aboriginals and other sensitive issues.
Maybe IOTL now that an Aboriginal has committed the worst mass murder in Australian memory, Pauline Hanson is a celebrated member of Parliament and her support base rallies around her. Her speeches are attended by more and more people, and this leads to her accelerating the founding of Pauline Hanson's One Nation in December of 1996. Could this lead to PHON becoming a reckoning force and possibly bring a Donald Trump-sequel figure to the helm of a nation 18 years before 2016?