What do you call a Protestant who learns Church History? An Orthodox Catechumen.
Then what about the ones who become Roman Catholic?
“Wherefore, then, death approaches, gulps down the bait of the body, and is pierced by the hook of the divinity. Then, having tasted of the sinless and life-giving body, it is destroyed and gives up all those whom it had swallowed down of old." - St. John of Damascus