I highly recommend watching the 30 for 30 Catholics vs Convicts if you haven’t seen it. It was really good. It was made by the roommate of the guy who created the Catholics vs Convicts tee shirt. It goes through how all the animosity started, how Holtz built up ND from the ashes. Why Jimmy Johnson hated Holtz.
That shirt was really the start of the whole college tee craze. Before that, you pretty much only had the bland official gear in the campus bookstore.
The funniest thing is the interviews with former Miami players acting hurt that they were characterized as "convicts" when anybody who remembers that time knows they promoted themselves as thugs. They were proud of it. That was their ‘swagger’.