By Anna Mehler Paperny TORONTO (Reuters) -Twice since July 2022, Moninder Singh, spokesperson for a Sikh advocacy group in Canada's British Columbia province, has had police come to his door in the Vancouver suburb of Surrey.

Ottawa's accusations this week detailing a deadly Indian campaign against its Canada-based critics may have further derailed bilateral relations -- but to Sikh activists, the striking disclosures brought validation.

As India doubles down on rejecting the claim it is behind widespread crimes in Canada, its foreign ministry is accusing Ottawa of trying to smear New Delhi.

There are roughly 770,000 Sikhs in Canada, about 2 per cent of the population - the largest Sikh community outside India Ottawa's accusations this week detailing a deadly Indian campaign against its Canada-based critics may have further derailed bilateral relations - but to Sikh activists,