Why does Australia tremble in the Canadian gun case?

Tell me where the gunman attacked this time. It is reported that the gunmen first attacked the war memorial in Ottawa, Canada, killing a soldier standing guard at the gate, then fled to the parliament building, where they were finally killed. The War Memorial and Parliament Building-Canberra people nod straight, because these two places are also the most famous buildings in Canberra, the capital of Australia.

Besides, the history of these two countries started from the British colonies and faithfully inherited the British political system, cultural traditions and values, just like the twin sons of the British Empire.

After the decline of the British Empire, Canada and Australia (including Britain itself) jumped on the train driven by the United States. Just look at the War Memorial in Australia. From World War II to Vietnam War, from Afghanistan War to Iraq War, Australia has never declined under the lead of the United States.

Canada and Australia are vast and sparsely populated, and immigration is an important means to increase population and ensure labor supply. In recent years, both countries have attracted many immigrants from Arab countries. Young immigrants who have received good education in western countries including Australia and Canada are becoming the focus of recruitment by terrorist organizations such as the Islamic State. At present, Canada has more than 100 nationals, and Australia has 60 or 70 nationals working in IS.

Both countries have recently announced that they will follow the United States to send troops to the Middle East and launch air strikes against IS. To this end, both countries have been included in the revenge list of is.