It’s a movie reference.
Quentin Tarantino, no less.
The Bear Jew is a Jewish member of Tarantino’s version of the Dirty Dozen. He has a unique style of dealing with Nazis.
http://www.greatestmoviedeaths.com/2009/08/inglorious-basterds-bear-jew-beating.html
Makes me feel warm and fuzzy.
Thanks! I had no idea when I made the bear/Mossad reference.