You said this: "He accepted the Catholic Church and the faith it teaches as a fuller teaching of the truth."
You wrote:
"Hint: This is the kind of arrogance that Christians should pull back from."
"He accepted...as" means it was his understanding of things.
Hint back: Learn to read. Don't confuse a statement about someone else's understanding as being representative about yet another's arrogance. Are you a product of the public schools?