The majority of UND's hockey team at that time was Canadian. (Note from this year's WJC roster and history that Team Canada picks from major junior, not American college, rosters to form a team.)
Next note that in the era in question, UND
Lost the 1979 National Championship game
Won the 1980 National Championship (two months after Lake Placid)
Won the 1982 National Championship
How long did it take you to learn to talk out of that oriface?