How far should Canada go in pressing India over Hardeep Singh Nijjar’s killing?

News Snapshot:

Open this photo in gallery: Police officers attend the scene of a shooting outside of the Guru Nanak Sikh Gurdwara Sahib temple, in Surrey, B.C., on June 19.Jennifer Gauthier/The Canadian Press In January, I received an invitation to lunch from the High Commissioner of India, Sanjay Kumar Verma. Interesting, I thought. Must be something big cooking in the India-Canada relationship. But no. Nothing. The High Commissioner gave no signal of trouble on the horizon. He was optimistic about a new trade agreement with Canada. He talked of good relations between Justin Trudeau and Indian Prime Minister Narendra Modi. No big...