From same article :
It is worth keeping in mind that Trudeau didn’t have much else to do in India that was more important than disabusing everyone of the misapprehension that Canada was becoming a safe haven for Khalistani whackjobs again. Trudeau’s one big job was to convince Chief Minister Amarinder Singh and Prime Minister Narendra Modi and everyone in between that Canada’s Liberal government was not backsliding to the ethnic-bloc politics of the 1980s. Apart from posing for photos and sightseeing and attending a few meetings, the only thing Trudeau really needed to do was persuade India that despite appearances, Canada wasn’t returning to the days when Liberal politicians were happily oblivious to the theocratic-fascist Khalistani movement, which had set itself up in Canada, with its dreams of carving out a Sikh state from the Indian portion of ancient Punjab, and its “government in exile” in Vancouver.
The Khalistanis went on to fund and arm mass terror in India. They seized the Golden Temple Complex, the holiest shrine in Sikhism, which paralyzed the Indian military, its generals afraid to move in. Then came Operation Blue Star, the assassination of prime minister Indira Gandhi, the horrific anti-Sikh pogroms, and Canada’s own Talwinder Singh Parmar, commander of Babbar Khalsa, who masterminded the worst act of terrorism in North America preceding Sept. 11, 2001: the mass murder of 329 people aboard Air India Flight 182 on June 23, 1985.