The diplomatic rift between Canada and India is growing tenser by the day, with India telling Canada this week that it must repatriate 41 diplomats by Oct. 10, a move that would remove the majority of Canadian diplomats in the country. The war of words erupted after Prime Minister Justin Trudeau declared that the Canadian government has “credible allegations potentially linking” the death of a Canadian citizen to agents of the Indian government. India rejected these allegations, calling them “absurd.” Since then, tensions between the two countries have escalated quickly – both countries have expelled senior foreign diplomats, India has halted visa processing for Canadian citizens, and is calling for Indian citizens in Canada to exercise caution. How did two Commonwealth countries with nearly a century of migratory history, good diplomatic relations, and a free trade agreement in the works, get here? In June, Hardeep Singh Nijjar, a Sikh leader and activist was shot dead by masked gunmen outside a Gurdwara in Surrey, British Columbia, a city in the Greater Vancouver area. Indian authorities allege that Nijjar was a terrorist and had announced a cash bounty for any intel on him. The Khalistan or separatist movement has little momentum in India, but in recent years, it has gained traction in countries with a large Sikh diaspora. Sikhs are an ethno-religious group that make up two per cent of Canada’s population. “Punjabis and particularly, Punjabi Sikhs are seen as the dominant face of the South Asian community in Canada,” explains Neilesh Bose, a professor of modern South Asian history and migration at the University of Victoria, in B.C. He goes on to explain that a significant number of soldiers in the British military in the 19th Century were Punjabi Sikhs. And Sikhs in the British military were deployed in many parts of the empire, including Canada. Another group of Sikh farmers and agriculturalists were dislocated from Punjab due to famine and laws on land ownership. In British Columbia, land was abundant and there was a perception that work is available and accessible. Through these early immigration patterns, many Sikh Punjabis found their way to Canadian shores, and went on to prosper here. For example, Jagmeet Singh, leader of the New Democratic Party, is Sikh. In 2015, four Sikh ministers were appointed to Cabinet, in an example of Canadian diversity. The Khalistan movement is a separatist movement that originated in the 1940s, during the Indian subcontinent’s struggle for freedom from the British Empire. The movement calls for a separate, independent state Khalistan (Land of the pure), in the Punjab region of India. In June 1984, the Indian armed forces – upon the orders of the then-prime minister, Indira Gandhi – stormed the Golden Temple, one of the holiest sites for Sikhs, to evict separatists who had taken refuge in the temple. A few months later, in October, Gandhi was assassinated by her Sikh bodyguards. Over the next few days, an anti-Sikh pogrom engulfed New Delhi, leaving in its wake, over 8,000 deaths and forced disappearances. Many young Sikhs, fearful for their lives, sought asylum in Canada. The following year, in 1985, an Air India flight from Canada to India carrying 329 passengers was bombed by Sikh separatists, killing all on-board. India considers the Khalistan movement a threat to national security and lists several pro-Khalistan groups as “terrorist organizations” under its Unlawful Activities (Prevention) Act. In recent times, the Indian government has cracked down on the Khalistan movement in India and arrested prominent activists. In response, Khalistan groups have carried out rallies across Canada, the United States, the United Kingdom, and Australia. Over the past year, pro-Khalistan groups have pulled down the Indian flag and defaced Indian consulates in London and San Francisco; several Hindu temples across Canada and Australia have been vandalized with anti-India and pro-Khalistan graffiti. A month after Nijjar’s death, a poster for an event in Brampton, Ont. was circulated alleging that the India High Commissioner and Toronto Consul General are the “faces of Nijjar’s killers,” and included the words “kill India.” The murder of Nijjar, this past summer, is at the centre of the diplomatic rift. India maintains that individuals like Nijjar were part of a vast, violent militant network.