My point, like Cyprian's and Firmilian's against Stephen of Rome, is our view that Rome departed from the Catholic Church 256ad over the issue of Rome's allowing heretical baptism as equivalent to the Church's. That Roman Catholicism now baptizes those coming to them from LDS (presumably) is one step back to their rejoining the Catholic Church.
"1. Cyprian to his brother Pompeius, greeting. Although I have fully comprised what is to be said concerning the baptism of heretics in the letters of which I sent you copies, dearest brother, yet, since you have desired that what Stephen our brother replied to my letters should be brought to your knowledge, I have sent you a copy of his reply; on the reading of which, you will more and more observe
his error in endeavouring to maintain the cause of heretics against Christians, and against the Church of God ..."
ANF05. Fathers of the Third Century: Hippolytus, Cyprian, Caius, Novatian, Appendix - Christian Classics Ethereal Library
There's much more information at the link over Rome's allowing for demonic baptism. Feel free to try to respond knowledgably.
PS. Firmilian makes the additional point that Rome departed from the faith of the apostles starting from the easter issue.
115-195 departure
256 departure
325 married the state
451 departure
1054 departure
1500-1600 departure
So, we get this from Cyprian (continuation from link above)
2.
He [Stephen] forbade one coming from any heresy to be baptized in the Church; that is,
he [Stephen] judged the baptism of all heretics to be just and lawful. And although special heresies have special baptisms and different sins, he, holding communion with the baptism of all, gathered up the sins of all, heaped together into his own bosom. And he charged that nothing should be innovated except what had been handed down; as if he were an innovator, who, holding the unity, claims for the one Church one baptism; and not manifestly he who, forgetful of unity, adopts the lies and the contagions of a profane washing. Let nothing be innovated, says he,
nothing maintained, except what has been handed down. Whence is that tradition? Whether does it descend from the authority of the Lord and of the Gospel, or does it come from the commands and the epistles of the apostles?
What was the source of Stephen's opinion? Not the Lord. Not scripture. Not even tradition. Only Rome's innovation and adoption of lies.