The keys are the words of Sacred Scripture and the words Jesus said to Peter apply to every ordained minister.
Interesting intrepretation.
I believe Mr. Madrid would return to (sorry I am Catholic and cannot quote by chapter and verse) the section where "you" is used in addressing Peter and is thus thought of as individual investiture.
If I recall correctly, isn't there a second investiture after Peter when the remaining Apostles are invested?
Perhaps he focuses on the second more that the first....or perhaps very simply he has a translation that doesn't include the same wording.
In the spirit of respect for other religions I must confess that were each Christian to consider themselves corporate in the works of the "Church" (as used by Touchstone Magazine to refer to every Christian regardless of degree of Communion) the same as this minister seems to, perhaps Ut Unam Sint wouldn't be so far off.
Or at the very least there would be more amicable ecumenical relations.