Nehemiah, agreed.
Yes, I've heard these explanations to fit there RCC theology.
Calvinist Theology is not RCC Theology. The Catholic Church teaches, and Catholic Christians believe, that Jesus Christ died for all, God loves all, and really wishes all of us to be saved, provided we too are willing to do His Will.
I don't know who told you otherwise, but I'm Catholic, and the Catholic Church doesn't teach TULIP. Like, not at all.
T for Total Depravity? Church rejects it. Teaches we have freedom of the will and are not "totally depraved"
U for Unconditional Election? God's Election is Gracious/undeserved but not unconditional. Also, Catholics, following St. Augustine, distinguish Justification and Salvation. Justification is by Faith, Salvation by Perseverance in Faith until Death.
L for Limited Atonement: It should be clear enough from this thread that Catholics like me reject it. If you want, I can cite Church Doctors of Theology like St. Augustine, St. Thomas Aquinas, St. Francis De Sales etc who say the same.
I for Irresistible Grace: Again, God's Grace is powerful, but only sweetly invites us to convert, first to faith, and then to holiness. It does not compel or force us. You know, forced love is no love at all. We call a man who "forces love" a rapist. God doesn't force anyone to love Him. But His Powerful Grace, when not resisted, impels us powerfully to freely love Him.
P for Perseverance of the Saints: Again, Calvin understands this as OSAS. According to him, Justification and Salvation are the same, and all the Justified necessarily persevere, which is contrary to many Biblical passages like Heb 6, Heb 10 and 2 Pet 2. I'll give the verses if you ask, but I think you'll know the passages.
Catholics go with St. Augustine again on this question, an Early Church Father/Bishop and Theologian well respected by many denominations and, ironically, Calvin himself. We believe Salvation=Justification+Perseverance. Hence, after Justification, we must pray for the Gift or Grace of Perseverance, and patiently wait for God to give it to us, which He will do before death.
Here is Wiki on that: "Augustine defined perseverance as gift by which one perseveres up to the end of their lives, if a person dies as a believer they had been given the gift, but if one dies as an unbeliever, even if he used to once believe, he did not have this gift given. Augustine believed that the gift can be received through prayer, but when one person has the gift, they can't lose it.
[6] https://en.wikipedia.org/wiki/Gift_of_perseverance
God Bless.