Should citizens lose their citizenship if they join a terrorist organization in a foreign country?

In 2016 the government expanded section 35 of the Citizenship Act to revoke the citizenship of any Australian who joins a foreign terrorist group. The measure includes Australians with single and dual citizenship and was proposed after several Australian nationals joined ISIS in the Middle East. The previous law revokes citizenship if Australians take up arms with the militaries of ‘enemy states’ but does not cover foreign terrorist organziations. Opponents include human rights groups and constitutional lawyers who argue that the law allows foreign governments to accuse people of terrorism for minor acts including graffiti and sit in protests. Proponents argue that the law is necessary to prevent terrorists re-entering the country.