The evidence the author uses to support the false analogy is that college sports are just as important as bookstores.
We can arrive at this answer because:
The author uses a false relationship between university games and university bookstores.
He uses this to show that students who work in bookstores receive salaries, but university players don't, but they are of equal importance.
The evidence that the author shows to confirm this relationship is that college games are as important as bookstores.
However, both the relationship and the evidence convey an incorrect idea.
Bookstores are part of the educational system that universities should promote, university games are not. In addition, many college athletes have scholarships, while students working in the campus do so for salaries or lower funding.
You can find more information about false analogy at the link:
This can be an example of nostalgia. (Nostalgia is a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations according to Oxford Dictionaries)
