St. Louis pizza is the style everyone loves to hate. Why can't Missouri be proud of that?

Is there any other regional pizza in the country that elicits as much debate and shame as St. Louis-style? A square-cut, thin-crust pie topped with ooey, gooey Provel cheese, this unconventional pizza is the result of decades of St. Louis ingenuity — and yet, even many locals apologize for their unique creation.