Puttin' on the Riiiiiiitttttzzzzz.(
He also starred as a right-wing superpatriot in a movie called "Joe". As much as Boyle was known for "Young Frankenstein", it was "Joe" that really made the critics sit up and take notice.
"Joe" is never shown on TV and you can't find it in video stores, but I'd love to see it. From the descriptions, it sounds frightening and, frankly, still pretty relevant.