I’m not in China so I can’t speak for the Chinese. However, your own words may have shown the reason: What has China done that harmed your interests that you feel you need protection from? Do you honest believe China is gonna invade you or stop your ships in the high seas (from reaching China)? Political influence? Oh please. What I read in articles sounded far less sinister than what your hysterical medias had portrayed them to be. In contrast, how much your government apparatuses are actually controlled by the Americans? The American Proconsul, i meant ambassador just gave your foreign minister an award for good behaviour. Pathetic really.
All the craps your media has spew about China over the years are all hysterical fake news. Australia is just not that important.
i think the Chinese netizens feel there is absolutely no reason for the Aussies to be so hostile that you would send your warships to China’s coast, team up with other hostile countries with the express intend of beating down China, allow US marines to base at Darvin, support American strategic bombers on their flight to (simulated) bombing run to China, and stopped any meaningful Chinese investments. By the way, people in China don’t seem to give a damn on how you treat Chinese Australians because they are after all Aussie citizens. The comments I read on Chinese forums generally feel Aussies are a bunch of ungrateful white supremacists.