John the Baptist was a Mosaic law adherent Jew, sent to other Mosaic law adherent Jews.
Jesus & the 12 were also Mosaic law adherent Jews sent to other Mosaic law adherent Jews.
Matt 10:5 These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not:
(MY NOTE: Jesus tells the 12. Don't go to GENTILES!)
6 But go rather to the lost sheep of the house of Israel.
(MY NOTE: Jesus sends the 12 to the lost sheep of the ""House of Israel"")
Matt 15:24 Messiah answered & said, I am not sent but unto the lost sheep of the house of Israel.
(MY NOTE: Jesus say's; He's been sent, ONLY, to the lost sheep of the ""House of Israel"")
Rom 15:8 I say that Messiah was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers:
(MY NOTE: While alive Jesus was a minister of the circumcision/Jews, NOT GENTILES)
Back to the Baptist:
The notion that John the Baptist a God chosen son of a temple priest, Mosaic law abiding Jew. & (Lk 1:1-36) Was in wilderness of Judea baptizing gentiles is antithetical to scripture.
These same Jews, stoned Stephen to death, beat the apostles, see what they did to Paul: Acts 9:29, 13:50, 14:5, 16:22-23, 18:12, 20:23, 21:31, 22:22, 23:3, 2 Cor 11:24-26 & had Jesus their long promised KILLED!
Acts 10:28 Peter tells the gentile Cornelius "IT'S UNLAWFUL" for a Jew to keep company with a gentile)
Jews to include Jesus (Matt 15:26) often referred to Gentiles as "dogs" (Matt 7:6; Lk 16:21)
Gentiles were considered so ungodly/unclean = to a dog. Just being in the presence of a gentile could make a Jew ceremonially unclean (Jn 18:28)
Acts 21:28-36 Jews that were aware of Paul's dealings with gentiles, throw Paul out of the Temple, begin to beat him to death. Roman soldiers show up & pull Paul from the mob.
Acts 21:37- Acts 22:20: Paul reasons with the Roman in charge & is allowed to address the crowd. They listen to Paul's conversion testimony until verse 21:
Acts 22:21 Paul say's he was sent to proclaim God to the GENTILES & the Jewish crowd goes ballistic & tries to KILL Paul.
The idea that a Temple Mt full of devote Mosaic law adherent Jews just stood by & remained peaceful. While John the Baptist is baptizing Gentiles is unscriptural as well.
Additionally:
No gentile receive the Acts 2:4 baptism of Holy Spirit on Temple Mt during the 1st post resurrection Pentecost. Not only for the same reasons at I gave above.
It's in Acts 10 that the 1st gentiles receive Christs baptism in/with His indwelling Holy Spirit.
Acts 10:44 While Peter yet spake these words, the Holy Ghost fell on all them which heard the word.
Acts 10:45 And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.
(MY NOTE: It was YEARS earlier at Pentecost that "Jews Only" received the Holy Spirit.)
If gentiles received the baptism of the Holy Spirit at Pentecost? Why, years later, are Peter & the Jews with him are ASTONISHED!
Acts 11:
15And as I began to speak, the Holy Ghost fell on them, as on us at the beginning.
16Then 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.
17Forasmuch 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?
18When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
(MY NOTE: When Peter returns to Church in Jerusalem. He tells Christ believing Jews what had happened at the gentile/Cornelius house.)
BTW: These gentiles received Christ's salvation sealing Holy Spirit baptism: NO repentance, no water baptism, no Mosaic law keeping, no circumcision, they brought no sin sacrifice to the Temple, underwent no mikveh.
It's by FAITH & FAITH ALONE these gentiles received Christ's salvation sealing Holy Spirit baptism. 10:38 God anointed Jesus with the Holy Spirit & power: (Vs 39) we are witnesses that the Jews had Him killed/HE DIED (Vs 40) and ROSE on the 3rd day. Gentiles were not part of the early Church in Jerusalem.)
Finally:
Aprox 14 yrs later at the Jerusalem Council (50-51 AD). We see the same Mosaic law adherent, unbelieving Pharisees that killed Jesus & Stephen, beat & killed most of the apostles trying(unsuccessfully) to put gentiles under Mosaic laws.
Today's Gospel of Salvation message is:
Source Amplified Bible
1 Cor 15
1 Now brothers and sisters, let me remind you [once again] of the good news [of salvation] which I preached to you, which you welcomed and accepted and on which you stand [by faith].
2 By this faith you are saved [reborn from above—spiritually transformed, renewed, and set apart for His purpose], if you hold firmly to the word which I preached to you, unless you believed in vain [just superficially and without complete commitment].
3 For I passed on to you as of first importance what I also received, that Christ died for our sins according to [that which] the Scriptures [foretold],
4 and that He was buried, and that He was [bodily] raised on the third day according to [that which] the Scriptures [foretold],
https://www.biblegateway.com/passage/?search=1 Corinthians+15&version=AMP
(MY NOTE: Vrs 1-4 Recap: The gospel of Salvation is: "Christ died for our sins was buried & rose again the third day")
Rom 5:
1 Therefore, since we have been justified [that is, acquitted of sin, declared blameless before God] by faith, [let us grasp the fact that] we have peace with God [and the joy of reconciliation with Him] through our Lord Jesus Christ (the Messiah, the Anointed).
2 Through Him we also have access by faith into this [remarkable state of] grace in which we [firmly and safely and securely] stand. Let us rejoice in our [a]hope and the confident assurance of [experiencing and enjoying] the glory of [our great] God [the manifestation of His excellence and power].
https://www.biblegateway.com/passage/?search=Romans+5&version=AMP
(MY NOTE: Vrs 1-2 recap: We access salvation/justification = Judicially declared righteous by a sovereign Creator God. By placing our FAITH in Jesus sin atoning sacrifice. Found in His death (sins required wage, PAID) burial (proof Jesus died) & resurrection (Father's receipt, sins payment received & accepted.)