Of course opinion piece of an individual does not represent the whole country nor do I think whole Australians are like that, but sure there are some who think like him (writer). That's whom I refer to when I use the word "they".
Err.. Do you even see the word "invasion" in my post that you quoted?
In fact most Indonesians don't care much about Australia.
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Right.. you didn't mention that, but the article was implying to say that Australian people feel worried that Indonesia might invade them and annex their island. You say that Australia perceive Indonesia as enemy which is not true either.
As a matter of fact, Australians for the most part believe they have obligations as a partner in further developing the standards of living, education, health and commerce in South East Asia, and that is reflected in their foreign relations with their regional neighbours like Indonesia.
Australia and Indonesia have good relations politically. Well as good as can be had between two nations that have very different views and very different historical backgrounds. Indonesia probably gets along better with Australia than with any of their other direct neighbours (Malaysia, PNG, Philippines, Vietnam, Singapore etc), it debatable but the Australian relationship has this strong basis.
I wouldn’t go to say they are best buddies, but they are two nations walking down the road and generally getting along. Sometimes they get a pebble in a shoe, but they are travelling together.
Its not an easy relationship, Australia getting caught spying on Indonesia, and reversing its policy on East Timor, refugees, fishing, oil and gas, live animal export. These are real tensions, that both countries have managed over long periods. Sure there were a couple of times we nearly went to war, Malaysian emergency and East Timor being two pretty critical moments. But both countries managed to get over these pretty huge issues, which if they occurred in other region would be long drawn out conflicts.
Australia has reasonable military ties with Indonesia, training officers and soldiers. There is regular high level and mid level dialog between the two nations, and areas where they collaborate to solve common problems.
Australia also find billions for Indonesia in the form of foreign aid. Indonesia is the largest recipient of Australian aid, to promote economic growth across Indonesia. In recent years Australia has continued to donate at least $500,000,000 annually to the Indonesian people. Is that really something you'd do for a nation you perceive as enemy?