I do not intend to be uncharitable and apologize if I have given offense. I did not mean that you as an individual were an apostate. However, I do not believe the position you have laid out has a biblical foundation. If it is not truth, it is apostasy, regardless of its source. To your point about the Magisterium and the extra-ordinary mode of baptism, a None of those sources is prophetic. None has the authority to announce doctrine beyond that which is laid out in scripture. In short, none is of God, since His method of operation is to call a prophet and announce His word through that person (Amos 3:7 KJV). Since the beginning, God has used prophets to teach His people. I see nothing in scripture to indicate that method has been rescinded. Therefore, any teaching not specifically grounded in the Bible is suspect, imho.
As an example.
This seems to suggest that a proper authority is unnecessary for the baptism to be recognized. It puts the Church, not God, in the position of arbiter of what will be tolerated (apostate Protestant baptisms are recognized, presumably because they are break-offs from the Church; mormon baptisms are not recognized because they were on the losing end of the debate at Nicea. (No prophet there, btw)).
Now, for the crux of the question:
Not to be combative, but wherever does it say that it is not?
Here are some verses to consider:
John 3:23 KJV “And John also was baptizing……because there was much water there.” Why would John need much water if immersion were not the protocol?
Mark 1:5, Matt 3:5-6 KJV “And there went out unto him all the land of Judea, and they of Jerusalem, and were all baptized of him (John) in the river of Jordan.” Could not the 3,000 cited in Acts 2 have done the same? Why was John at Jordan?
In Romans 6:4 KJV, the symbolism of baptism is explicitly explained. We are buried in sin and raised up out of the water pure, just as Jesus died for our sin and was resurrected perfect.
Surely you know that the word itself – baptism – means to dip or immerse.
I could go on but I believe this is adequate to answer your question. Immersion IS the stated form, it IS the sole form, and it requires proper authority to be valid. Again, imho, everything you have presented is a contortion designed to circumvent the clear command that EXCEPT one is baptized (by immersion, with authority), entrance into heaven is not possible.
As for the mormon belief in 3 Gods vs 1, I see little difference between that and the Church’s current description of the Father, the Son and the Holy Spirit. Do you deny that Christ is God? Does not John 1 state as much? Why did Stephen see the Father and the Son in vision at his death? Why did the Father announce His approval and the Holy Spirit give witness of the divinity of Jesus at His baptism? If they are the same essence, why the multiple manifestations? The answer should be obvious.
Your argument that the Magisterium is not “of God” is flawed, because by that very argument, there is no such thing as oral tradition or even, for that matter, true interpretation of Scripture; if it is not said in the act of saying done by a prophet, then by your argument, it is not of God. But when the Church speaks from the Magisterium, she speaks with her authority of interpretation, and that authority is most definitely “of God”; it was given to St. Peter, the keys of the kingdom. But I will also add in addition that unless you can find an explicit Scriptural justification for saying that the only way to determine if a given statement is “of God” is Scripture itself and alone, then your argument has already failed, and I have seen no such justification. Rejecting your principle, therefore, whereby you exclude “not-Scripture”, I exclude your conclusion, that my use of the Magisterium is invalid.
Now, I don’t have to answer your question as to where it says baptism is “not” immersion, any more than I have to answer a question as to where the law that says we must do a handstand every Tuesday is in Chronicles. The onus of proof is on YOU, not me. But I will say where it IS said in the Early Church that immersion was not the whole and only practice:
“Concerning baptism, baptize in this manner: Having said all these things beforehand, baptize in the name of the Father and of the Son and of the Holy Spirit in living water [that is, in running water, as in a river]. If there is no living water, baptize in other water; and, if you are not able to use cold water, use warm. If you have neither, pour water three times upon the head in the name of the Father, Son, and Holy Spirit.”
Didache
“If water is scarce, whether as a constant condition or on occasion, then use whatever water is available”
Hippolytus of Rome, note that he does not care whether the situation is constant or on occasion.
“with so great simplicity, without pomp, without any considerable novelty of preparation, and finally, without cost, a man is baptized in water, and amid the utterance of some few words, is sprinkled, and then rises again, not much (or not at all) the cleaner.”
Tertullian, note that he says one is not much or at all the cleaner, and note that he says it is “sprinkled.”
Early Christian artwork may depict men baptized standing in a river, but it is not immersion; they have the water poured in almost every case over their head. Flatly, unless you wish to say that the Apostles themselves and their immediate disciples were wrong (a most untenable position!) then you are in error.
This is not to say I cannot provide a Scriptural basis; my problem is that you seem quite content with your narrow (and isogetical!) interpretation of the Bible that I worry any verses I may cite will be taken in bad spirit. Nonetheless:
“you heard from me, for John baptized with water, but before many days you shall be baptized with the Holy Spirit.” (Acts 1:4-5) But they are not “immersed” in the Holy Spirit, a passive verb; rather, the Spirit is “poured out” upon them, and this is said three times in Acts 2; 2:17, 18, 33. Furthermore, the Spirit is referred to as “falling” upon them by Peter (Acts 11:15-17) and this is explicitly identified with baptism. But I do not doubt, given previous obstinacy, that you will not settle but for a verse that says “By the way, baptism doesn’t just mean immersion, guys”, and that not from the Apostles, but from Christ, for fear that perhaps Peter isn’t “as inspired” as Our Lord. So I have little hope for the good fate of this small sed contra.