Well, that may be true, but that doesn't really explain things. One of our first years in the US (Illinois, if it makes any difference), my husband came home and said we were invited to a Memorial Day barbecue. I was literally shocked. I had to ask him to explain, because I was like, "They celebrate Memorial Day with a barbecue????" (Not to mention big Memorial Day holiday sales.) It is just so counter to the atmosphere surrounding Canada's Remembrance Day.
This article definitely illustrates the difference between the Canadian and US approaches, from when a US retailer tried to hold a Remembrance Day sale in Canada. Let's just say that things didn't go well, and the person was quoted as saying, “Canadians are very sensitive about the commercialization of this sacred holiday,”
Remembrance Day sales in Canada are 'a rookie mistake,' expert says
ETA: You added a lot more to your response, which wasn't there when I responded to your initial single line.