<< I have a protestant quoting from Dave Hunt’s “The Woman Rides the Beast” in a public forum and I want to defend the Catholic position before he leads anyone astray >>
Dave Hunt’s main source for that point is Peter DeRosa who is not a patristics scholar. I would suggest doing a search in these forums for Peter, Rock, Fathers, etc. There are at least 20 good threads on that topic. Point out also the Catechism itself presents several interpretations, with Peter = Rock the primary one. St. Augustine had all views: Peter, Christ, Peter’s faith/confession, and Peter’s successors.
Also make sure you nail them with Protestant/Evangelical commentaries on Matthew 16. Plenty found here in my unfinished response to James G. McCarthy’s anti-Catholic book.