Mark Steyn’s excellent review, which got me to watch it.
https://www.steynonline.com/7956/49th-parallel
My Canadian wife also approves of this movie.
Agreed on your praise of Mark Steyn. Certainly a scholarly piece and well put. I saw the film in England as a small boy in WW2. Always remember the phrase spoken by actor Leslie Howard.
Wars may come and wars may go, but art goes on for ever.
It was thought at the time that the film was aimed at French Canadians. Many in Quebec did oppose the war at the time, including Pierre Trudeau - later Prime Minister. Others joined in the fight against fascism and fought with distinction.