You are mistaken. Romans 6 refers to our crucifixion on the cross with Christ, not our burial by baptism with Him in the tomb.
That is your POV in spite of the opening of Rom 6 and verse 3?
"3 Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?"
I am not mistaken.
Baptism was taught and practiced by John the Baptist who was preparing the way for Christ's first return and the birth of His Church.
Yes indeed, and it also provided remission of sins.
"And he came into all the country about Jordan, preaching the baptism of repentance for the remission of sins;" (Luke 3:3)
Tongues were spoken by early church members as a testimony to unbelieving Jews,
It is still proof, to unbelievers.
just as baptism was designed to be a witness to Jews of Christ's institution of baptism in the Holy Spirit
Scripture, please.
rather than offering sacrifices, to enter the Holy of Holies with God. The importance of baptism as a sign and tongues as a sign diminished as time went on and God gradually moved away from Israel and focused attention on His Church.
God has retained those signs and proofs for His church.
The Gospel was committed to the 12 Apostles (Jews) with the command to preach first to the Jews, then to Samaria, then to the Gentiles.
Scripture, please.
We see Peter going first to the Jews, then to Samaria, and then to the Gentile Cornelius.
And we see Philip, not an apostle but one of the seven, going to meet the Ethiopian eunuch.
And ending up water baptizing him.
Peter preached baptism early in his ministry, but not to Cornelius.
Really?
You must have missed Acts 10:47-48..."Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we?
48 And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days."
If baptism was now unnecessary, why did Peter, and the six men who went with him, baptize Cornelius' household?
In fact, it was when preaching to Cornelius that Peter first saw that baptism was about Spirit baptism, not water baptism.
Acrts 10
12 And the Spirit bade me go with them, nothing doubting. Moreover these six brethren accompanied me, and we entered into the man's house:
13 And he shewed us how he had seen an angel in his house, which stood and said unto him, Send men to Joppa, and call for Simon, whose surname is Peter;
14 Who shall tell thee words, whereby thou and all thy house shall be saved.
15 And as I began to speak, the Holy Ghost fell on them, as on us at the beginning.
16 Then remembered I the word of the Lord, how that he said, John indeed baptized with water; but ye shall be baptized with the Holy Ghost.
17 Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I, that I could withstand God?
18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
19 Now they which were scattered abroad upon the persecution that arose about Stephen travelled as far as Phenice, and Cyprus, and Antioch, preaching the word to none but unto the Jews only.
There is no indication Peter encouraged Cornelius to get baptized in water.
Nothing except Acts 10:47-48.
The gift of the Holy Ghost, or Spirit baptism if you will, did not succeed water baptism but was added to it.
Peter preached baptism to Jews in the first 9 chapters of Acts, and Ananias (a Jew) preached baptism to Saul (a Jew.) But baptism is not mentioned as a necessity to Gentiles as a witness of their saving faith in Christ.
You have forgotten Crispus, Gaius, and the household of Stephanus, (1 Cor 1:14-16), the twelve at Ephesus, (Acts 19:5), the Thyratiran jailer, (Acts 16:33), and the many at Corinth. (Acts 18:8)
1 Corinthians 1
14 I thank God that I baptized none of you, but Crispus and Gaius;
15 Lest any should say that I had baptized in mine own name.
16 And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.
17 For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
18 For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
God did not send Paul to preach baptism to Gentiles, He sent Paul to preach the Gospel instead.
If you are going to use those words of Paul to determine what is important, then knowledge of the birth and life of Jesus Christ, not to mention His resurrection from the dead according to what the prophets told earlier, is also not to be taught.
His miracles and all the proofs of who He was are verboten.
That 'baptism is not the first thing one presents to unbelievers' is all Paul is saying, and that knowledge of Christ taking our sins on Himself and His resurrection from the dead, (the gospel}, were to be preached first.
One step at a time.