That would be "Canadians who went off the rails." It's silly to get this pedantic as long as the statement isn't misleading. The meaning is fairly clear here;

That would be "Canadians who went off the rails." It's silly to get this pedantic as long as the statement isn't misleading. The meaning is fairly clear here; even the "prey vs. pray" issue is unimportant. We all know what the author meant.