Being I've familial experience with the Roman Catholic mindset this may help you.
When debating scripture with a RC remember, they are not Christian. They are Catholic.
Wrong. You invent a false dichotomy between Catholic and Christian.
Are Catholics Christians? Is Catholicism Christian? (vs. James White) Romans 1:8 uses the term "whole world", Gr.: kata holis, Lt.:Catholicus, En. Catholic. That proves St. Paul was a Christian and a Catholic! To you, "Catholic" is just an adjective, not one of 4 divine qualities that Jesus builds His Church on. Jesus doesn't build junk that needed an overhaul 16 centuries later. Your "wrecking ball" approach reveals you to be prejudiced and a slave to conflict.
They were not led by God to follow Christ.
That's true, but what about the Catholics who
are led by God to follow Christ? Pick any century you like. I'll start with my favorites, you can reply with a list of Protestants who lived an exemplary life in Christ. Any century will do.
But you have to unclench your fists so we can have a mutually uplifting discussion to the benefit of all.
St. Dymphna 7th century
St. Francis of Assisi 12th century
St. Max Kolbe WWII
St. Mother Teresa recently
Your turn.
As infants they were sprinkled and made a member of the church.
Luther and Calvin, two pillars of Protestantism, did the same thing. You oppose your own Protestant founders. That makes you a true Protestant.
They only believe what the Catechism tells them to believe.
Wrong again. The Catechism is a summary of official Church teaching, expanding on the essential truths as expressed in the Nicene Creed, and teaches on faith and morals in every day language. It also addresses todays problems that threaten civilization and is not bound by 16th century politics. All teaching is
proposed to those
disposed to receive it, she cannot and does not
impose on anybody, contrary to the psychotic rants of paranoid anti-Catholics.
If it is wrong to have a catechism explaining teachings, then it is wrong for Protestants to have catechisms too. Lutherans have their confessional documents in the
Book of Concord. For Presbyterians there is The Westminster Shorter Catechism. The 1689 Baptist Confession of Faith contains a catechism as well. What ever happened to "sola scriptura"???
The Nicene Creed is an accepted standard by the administrators of this forum (at least it used to be), It's recited every day at every Mass throughout the
whole world. (kata holos). See Romans 1:8.
The second last line states "I believe in One, Holy, Catholic and Apostolic Church. Those are 4 marks of God, not 3 1/2. You may have some or parts of these divine characteristics, but you have yet to prove you manifest all of them in their fulness.
811 "This is the sole Church of Christ, which in the Creed we profess to be one, holy, catholic and apostolic."256 These four characteristics, inseparably linked with each other,257 indicate essential features of the Church and her mission. The Church does not possess them of herself; it is Christ who, through the Holy Spirit, makes his Church one, holy, catholic, and apostolic, and it is he who calls her to realize each of these qualities.
812 Only faith can recognize that the Church possesses these properties from her divine source. But their historical manifestations are signs that also speak clearly to human reason. As the First Vatican Council noted, the "Church herself, with her marvelous propagation, eminent holiness, and inexhaustible fruitfulness in everything good, her catholic unity and invincible stability, is a great and perpetual motive of credibility and an irrefutable witness of her divine mission."258
footnotes:
256
LG 8.
257 Cf. DS 2888.
258 Vatican Council I,
De Filius 3

S 3013.
Catechism of the Catholic Church - PART 1 SECTION 2 CHAPTER 3 ARTICLE 9 PARAGRAPH 3
That's the proper way to cite the catechism, whereas Calvinist Matt Slick (CARM) makes his living by twisting and distorting snippets with no context. (because it sells)
The Church Is One (Rom. 12:5, 1 Cor. 10:17, 12:13, CCC 813–822)
The Church Is Holy (Eph. 5:25–27, Rev. 19:7–8, CCC 823–829)
The Church Is Catholic (Matt. 28:19–20, Rev. 5:9–10, CCC 830–856)
The Church Is Apostolic (Eph. 2:19–20, CCC 857–865*)
Their belief isn't in Christ first. It is in the church.
Because Christ commissioned the Church to teach us the truth about Christ, the truth about man. He said nothing about a bible.
CCC 865 The Church is ultimately one, holy, catholic, and apostolic in her deepest and ultimate identity, because it is in her that "the Kingdom of heaven," the "Reign of God,"380 already exists and will be fulfilled at the end of time. The kingdom has come in the person of Christ and grows mysteriously in the hearts of those incorporated into him, until its full eschatological manifestation. Then all those he has redeemed and made "holy and blameless before him in love,"381 will be gathered together as the one People of God, the "Bride of the Lamb,"382 "the holy city Jerusalem coming down out of heaven from God, having the glory of God."383 For "the wall of the city had twelve foundations, and on them the twelve names of the twelve apostles of the Lamb."384
footnotes:
380
Rev 19:6.
381
Eph 1:4.
382
Rev 21:9.
383
Rev 21:10-11.
384
Rev 21:14.
(WOW! Scripture in the catechism!!! Who knew???)
The church tells them their salvation and faith is not eternally secured by God's gift through grace.
John Calvin was wrong, and so are you. The historic Church always taught "grace alone" before it was
rediscovered.
My biggest interest lies in Institutes Book IV:
Of the Holy Catholic Church. This is where the real contrast between Calvinism and Catholicism is most evident. I like to go right to the heart of any given issue, and that’s located here, in my opinion.
55 Critiques of John Calvin: Introduction & Master List
They are not eternally saved from their sins.
Wrong again. We know, with 100% infallible certainty, we are saved from our sins after we are dead and with God, not before. Calvin pulled "eternal security" out of his hat, as no one previously thought of it.
It's why they have to perpetually confess.
Wrong again. We are obligated to confess serious sins that separate us from God and others and go to confession at least ONCE A YEAR. Any Christian who doesn't take a fearless moral inventory of themselves and talk it out with another human being, risks being an
isolated spiritual infant. If it's wrong to confess sins to a priest for the sake of our souls, then it's wrong to confess to a therapist for the sake of our minds. It's a fitting analogy. Your cartoonish view of confession is more like the garbage portrayed in Hollywood movies. It's a deeply personal sacrament for Catholics striving to grow in holiness and is totally biblical. Its not for outsiders to mock and we don't impose it on anybody.
Absolution, Sanctification, & Forgiveness: Reply to Calvin #7
And even when they die they have to lose residual sins in purgatory until they're burned away.
Wrong again. Purgatory is about cleansing imperfections, not residual sins. How do you interpret 1 Corinthians 3:10-15? Can you discuss it without throwing rocks? BTW, the concept of purgatory began in kernel form with the Jews, sanctified and expanded on by Jesus and Paul. But you don't attack the Jews, that would be politically incorrect.
Or, unless relatives buy their way out.
Must you resort to false, disgusting insults?
Jesus death on the cross didn't ''do it all''. They need the church. Even when they're dead.
Your 9 fallacies incriminate yourself, not the CC.
Lastly, CCC
870 "The sole Church of Christ which in the Creed we profess to be one, holy, catholic, and apostolic, . . .
subsists in the Catholic Church, which is governed by the successor of Peter and by the bishops in communion with him.
Nevertheless, many elements of sanctification and of truth are found outside its visible confines"(LG 8).
We don't claim to be the only candy store on the block, contrary to exclusionist myth.