Let me not equivocate here and be direct. I do not consider the spreading of Protestantism to be in anyway linked to the building up the Kingdom of God. Spreading a false gospel does not serve The Lord. Baptising people into a fractional truth is not of the spirit of Christ. Paul’s humble words to the Corinthians were his recognition that he was not an original apostle. But I don’t really understand why you identify with Paul here. Paul had the fullness of truth and was selected by Christ to teach the good news. But Paul, perhaps above all the apostles was completely intolerant of those who preached a false gospel that they did not receive from an apostle or an authorized apostolic disciple.
Galatians 1:9. As we have said before, so I say again now, if any man is preaching to you a gospel contrary to what you received, he is to be accursed!
We know that nothing deserving of a curse shall be permitted heaven. So there is no concept of partial merit for preaching fractional truths that contradict true apostolic teaching.
As for working toward an attitude of Love - consider my correction an act of love.
What good does “the lost” seeking “the lost” do anyone? You are assuming wrongly that you can be saved outside of the Catholic Church. Catholics think it is only by unusual exception of invincible ignorance that anyone can be saved outside of the Catholic Church. You may believe that you are united in Christ but I don’t believe that God wants people teaching new gospels that do not agree with His Church - the Catholic Church. He said so as much in:
Luke 10:16 “The one who listens to you listens to Me, and the one who rejects you rejects Me; and he who rejects Me rejects the One who sent Me.”
Matthew 12:30 “He who is not with Me is against Me; and he who does not gather with Me scatters.”*
“In the end, it doesn’t matter what church you get discipled by, provided that they properly acknowledge who Jesus is and what He’s about- and if a person’s new to Christianity, it’s kind of nice to get exposed to different options so they can decide for themselves?”
There is no such bible verse. Quite the contrary Jesus warns against factions and divisions and it is Protestants who left the unity of the One Faith not the other way around.
In the end those who rejected Christ’s Church, Christ will himself reject (Luke 10:16).
There are no options - one is either with Christ following the one faith or one is outside the faith.
I do not believe that you are “in Christ” while being in separation from His Church anymore so than I believe a fellow Catholic is “in Christ” while in a state of grave sin and disgraced.
As for who is my brother I think I will go with what Christ said:
Matthew 12:49-50 "And stretching out his hand toward his disciples, he said, “Here are my mother and my brothers. 50 For whoever does the will of my heavenly Father is my brother, and sister, and mother.”
I don’t consider Protestants disciples and only consider them as marginal Christians by right of The Catholic Church recognizing your Baptism (at least those Protestant sects who still practise it). I do not hate Protestants since all have the potential for Christ in them but I do despise the false teachings, ignorance of history and shallow theology that Protestants spread like wild weeds and cause serious harm, confusion and suffering to the One Church.