I can't find that previous entry in the edit history, and the talk page history just has one question about Dolan's jq. Where can I see the background you're talking about?
> Expired PROD, concern was: The only reference is primary, as are all external links. No indication that this is more than a personal project. Article was created by Jordinas, whose contributions all involve adding links to jq from other pages; COI likely.
Surprisingly, this type of moderation is what made Wikipedia thrive. You can be as flabbergasted as I once was about the process. But exactly those "dumb" criteria make the system work. The admin did his job here and probably on twenty more identical deletions the same day.