As I mentioned before I took a class about Canadian Culture...and it almost entirely was based on the Canadian search for/lack of a national identity. Then a friend of mine sent me this link about the Canadian band the Group of Seven (named after the best-known Canadian artist group). I listened to Passport a few times and it covered almost all of the themes of the course.
When they refer to getting identity from beer commercials they mean things like this:
...extraordinarily nationalistic considering Molson Coors is half American-owned.