• When the populatiin was all British, the English, Irish, Scottish etc all hated each other
• The catholics, CoE and all the other brands of christians hated each other. They’re OK with each other now they can all hate on the Muslims
• When Greeks, Italians and other Europeans started migrating well, all the British lineages hated them.
• When asians started arriving, well all the above started hating on them

The one constant is that everyone seems to have always hated on the Indigenous Australians. Cue Alanis Morrisette.