I do have some sympathy for the Sikhs, since Modi is legitimately a fascist and a religious & ethnic nationalist.
At the same time, I have zero patience or tolerance for any groups of people who bring their sectarian conflicts from back home with them to Canada.
Like the Tamils a while back who got it into their heads that Canada somehow had an obligation to intervene in the Sri Lankan civil war on the side of the Tamil Tigers, and started blockading major roads & highways in Toronto in support of that goal.
So if these Sikhs want to fight some Hindus, get the fuck out of Canada and go do it back home in the Punjab. And if any of those arrested for attacking the temple have precarious immigration statuses, the Canadian government should help them do that by escorting them onto a plane back to India.