“Just so the rest of us can read the passage,”
No, we have to have agreement on the first part. That Christ established a Church for the express purpose of spreading the Gospel.
Until this point is settled, only then we can move on. Are you willing to concede that Christ did, in fact, establish a church with the express purpose of spreading the Gospel?
What you have my agreement on is that Jesus said, "Upon this Rock (likely the confession that Jesus was the Messiah) I will build my congregation/assembly (ekklesia)."
Part of this thread has been about the fact that the word "church" is a manufactured word that came from German/Dutch "kirk". Go check the etymology. There was no such word in the Bible. And, if you insist on special treatment, then the same word is used in Acts 19:32 for a unregenerate mob rioting in Ephesus. Can't square the circle.