The Indian government is engaging in apparent blackmail of the Star Alliance, following the global airline group’s rejection of Air India’s membership application. New Delhi’s threat to take away traffic rights from Star members is about to test the diplomatic skills of both the affected carriers and the alliance leadership.

As I wrote in August, Star really, really wanted to add Air India to its network, because of the large and fast-growing Indian market. It spent more time, effort and money on helping Air India meet the membership requirements than it has with any other candidate. At the end, however, Air India’s entrenched corporate culture and internal Indian politics became unbearable, and the alliance gave up…