In fact, exactly NZ gov't should have continued doing things as usual. This tragedy, while having huge media-multiplied emotional response, is (from POV of rati

In fact, exactly NZ gov't should have continued doing things as usual. This tragedy, while having huge media-multiplied emotional response, is (from POV of rational security) is an absolute outlier. An average Kiwi has probably bigger chance to choke on beefsteak than to be killed by a political weirdo. Few politicians however are able to resist a temptation to pose as a "decisive leader" and play a security theater.