You're right and there hasn't been a terrorist incident in Australia targeting Australians (I don't think ISIS is specifically targeting white Australians, rath

You're right and there hasn't been a terrorist incident in Australia targeting Australians (I don't think ISIS is specifically targeting white Australians, rather Australians in general), but I think that there being an 'increased threat level' is still appropriate. Whether or not the perpetrator of the stabbing had an actual link to ISIS isn't clear, but he had his passport cancelled over concerns he would fly to the Middle East and he had previous posted photos online with the ISIS flag: http://www.theage.com.au/victoria/numan-haider-from-teenager-to-terror-suspect-20140925-10lt8m.html http://www.theage.com.au/victoria/numan-haider-from-teenager... Of course most Australians travelling to the Middle East are involved in terrorism, but there are Australian residents or citizens travelling to the Middle East to fight adn they have been involved in two suicide bombings as well as apparently joining organisations designated as terrorist by the Australian government, and so I'd say that they are certainly linked to terrorism.