not necessarily submissive, more a stereotype that they'll never get angry and seem incapable of holding a grudge no matter how horrible someone's been to them. The stereotype comes from Canadians always going out of their way to be on friendly relationships with americans, because they have 3000 miles of border with the USA, a far more powerful country. However their recent prime minister Trudeau did not help this stereotype due to how he handled problems of chinese speculators buying up huge amounts of canadian land and various other immigration and foreign affairs issues by just blithely accepting it and asking Canadians at large to just accept it too.