Every time I hear about Ranger-Celtic I always think of this documentary. Granted I knew about the rivalry before I saw it but really all I knew was that it had a reputation as possibly the most intense and dangerous rivalry in the world. Not to many specifics beyond that.
It's kind of sad. I aced an Irish History course I took on a whim in college, which I was interested in, being part Irish myself, but I'm kind of ashamed to say that I know so little about the history of Scotland. Before watching this doc I was shocked to learn that the Protestant-Catholic dynamic was even present there.