The fact is that Iran has been a thorn in the wests arse for a long time. There isnt a lot of sympathy there for a country we have heard a lot of "death to the west" and other general "nuke Israel" rhetoric from since the 1980s. Especially with more than a few arab immigrants to Australia being Iranian and having left because of who is in power.

The general sentiment IMO is that while The USA are doing their usual international meddling and we are fucking sick of Trumps bullshit, Irans leadership certainly did the international politics equivalent of saying "Go on hit me!" to the schoolyard bully for long enough that nobody really cares that the bully finally snotted him. There have been lots of protests about Israel/Palestine there has been very few about Iran in a country where there is a significant number of people from middle eastern origins, I think thats pretty telling.