"Minnesota has got to be one tough place to be an effective police man as PC as things are there".
That's why they are called "square heads". And by the way, where did that come from?
Well, when I was a kid, the krauts, i.e. Germans, were called squareheads. The Italians were called wops, the French were, and still are called frogs. That was 100 years ago.
Does that clear it up for ya? .............. FRegards