Should be a no-brainer, whether in Australia or here in the U.S. Anyone who attacks fellow citizens of their own country because they wish to destroy that country is the very definition of a traitor, and should not only lose their citizenship but be executed.
Attacking your own is something that even animals know is anathema. Fully agree with you.
Agreed in full and without reservation. Terrorists are already dual citizens: of Hell. Let them relocate there.
But like everything else here, they’ll just get a stern talking to and allowed to carry on.