If the relationship between Australia and China can be salvaged, then it wouldn't come down to this. It is not lack of trying. Let me remind people again what Australia has done over the past few years. First country to ban Huawei, first to request a criminal investigation of China over covid, first to enact a McCarthy era law to prosecute Chinese friendly Australians under the name of national security, first to expand law to grant the government authority to ban any acquisition and investment from China, most active member of Quad etc. The list can go on and on. If China let Australia off the hook just because its PM offers some olive branch, then what would the world thinks about China.
Understandably, many members would ask why China can't make compromise like it used to do in the last few decades. The answer is obvious. China is no longer a regional power. China can no longer hide behind the image of a developing nation. Most importantly, Chinese no longer want to be a pushover. Beside, the US and its allies would keep attacking China no matter what. Australia has already decided to join the US containment strategy to contain China.
To add, China is now seen as a threat, because it has become too big and influential.
I think the cartoon publication will work out for China:
1. It makes an example out of Australia.
2. There's no way Australia can escape from the attention it draws to its soldiers being out of control and committing war crimes.