Earlier quoted context omitted.
Is the primary goal of security at a college football game to stop a suicide bomber? I strongly doubt that's how they see it.
It worked in Paris a few years ago. Two suicide bombers were stopped at security and detonated their suicide vests - no other people were killed besides the terrorists.
When I was in college, campus security already banned a range of items at sports games. In 1989, they made national news for adding marshmallows to the list of banned objects: https://www.nytimes.com/1989/10/26/sports/michigan-to-ban-ma...
That suggests to me that college stadium security is mainly about policing mundane behavior at college stadiums, and very little to do with terrorism.