The Prime Minister wants New Zealand to do what it can to help Western powers deal with the so-called Islamic State that has taken over a swathe of Iraq and Syria. It would be "odd" if this country did not take part, he said at the weekend. Without air strike capability there is not much New Zealand can contribute to the present level of engagement, and if the United States and its allies decide to put forces on the ground, Mr Key sounds reluctant to follow suit. So what can this country do to show support?
Yesterday the Cabinet considered a proposal to stop anyone from this country going to fight for Isis by seizing the passports of anyone suspected by authorities of going. It may be the little that New Zealand can do for the cause but it would be too large an affront to New Zealand's liberties.
Seizing a passport is a drastic step, stopping a person from going anywhere. The person ceases to be a free citizen and becomes a captive in his or her own country. That may be justified if the person has committed a crime or been found to be acting against New Zealand's interests overseas, but not merely on suspicion.
Muslims in New Zealand, especially if they have migrated from the Middle East, have reason to fear they could have their passports confiscated if they try to travel to the region for family reunions, pilgrimages or other innocent purposes. But all New Zealanders might be disturbed to see the Government taking this step.