But how does this work in practice? There are a million Sikhs in Canada, so we stand up a Sikh regiment. Can only Sikhs be a part of this regiment? Does that mean we will stand up a Christian regiment, a Muslim regiment, a Jewish regiment, and an atheist regiment? If I join the Sikh regiment as a non-Sikh, do I have to wear Sikh articles of faith as part of my uniform? Does this mean I can't wear the symbols of my religion?
Also, if you want to target a specific demographic with a new regiment, is the demographic that is only 1 million spread across Canada really the one to target? Even if by some miracle, all 1 million lives in cities with an army reserve presence, that's 12,500 if spread evenly, so to fill out a 300 pers reserve unit, that's 2.4% of the city's Sikh population, a significantly bigger ratio than the 0.075% of Canadians who serve in the PRes.
The highland regiments continue to be viable because its cultural, not religious, and that culture is already integrated strongly into Canadian identity and culture. You can see the effect that Scottish immigration had on Canada very clearly in most cities, from the architecture, city and street names, every single police and fire department having bagpipes. Nobody joining the Middle of Nowhere Highlanders has to convert, they just have to lean into a part of Canadas history and culture that may have been more understated in their life.