I’m a Protestant, and I’m ignoring him/her. Full disclosure: I’m considering joining the Church. I’ve been doing so for years now because it’s not an easy decision.
In Revelation there are 7 churches. I lean toward the Calvinists in theology but worship in any church I attend. Don’t have a church that matches my theology but that’s okay.
As C.S. Lewis expressed,
“The real reason why I cannot be in communion with you [Catholics] is not my disagreement with this or that Roman doctrine [but see his quotes below on disagreements with some Roman Catholic doctrines], but that to accept your Church means, not to accept a given body of doctrine, but to accept in advance any doctrine your Church hereafter produces. It is like being asked to agree not only to what a man has said but also to what he is going to say.”- C. S. Lewis, “Christian Reunion”, in Christian Reunion and Other Essays, edited by Walter Hooper, London: Collins, 1990, p. 17-18. http://beggarsallreformation.blogspot.com/2011/09/two-excellent-quotes-by-c-s-lewis-on.html)
RCs suppose that Rome is steward of Divine revelation and inheritor of Divine promises of God's presence and preservation, and has historical descent, and thus she is the perpetually infallible interpreter (or declarer) of Truth. But which is not how the church began, and in fact that model effectively nukes the church.
Of course, Rome has presumed to infallibly declare she is and will be perpetually infallible whenever she speaks in accordance with her infallibly defined (scope and subject-based) formula, which renders her declaration that she is infallible, to be infallible, as well as all else she accordingly declares.
However, the Lord and NT church established truth claims upon upon Scriptural substantiation in word and in power, (Mt. 22:23-45; Lk. 24:27,44; Jn. 5:36,39; Acts 2:14-35; 4:33; 5:12; 15:6-21;17:2,11; 18:28; 28:23; Rm. 15:19; 2Cor. 12:12, etc.) and it was by Scriptures that they were tested, as Acts 17:11 testifies, and thus to it being the supreme standard and assured word of God.
And in the world today it is not that of Roman Catholicism that evidences the resurrection and thus regenerative power of Christ the most (though coming short of the prima NT church), but those church who most hold to the conservative evangelical faith.
:)