What you and your buddy are missing is that if Jesus was alive the NT had nor taken effect yet which is clear discussed on the Hebrew letter that I pointed out since it states that a testament is not in force until the death of the testator, Jesus.
I fully agree about the testaments.
In regards to baptism, it's a moot point, since the requirement of baptism as relates to salvation did not take effect likewise until after the death of Christ. You couldn't be baptized into Christ or his death if he were still living.
I understand what you're saying, but what I disagree with is the emphasis on "water" baptism. I was baptized with Holy Spirit and with fire, and so born again from above, so nobody can say that I was not baptized.
What this means, as relates to the forgiven thief, is that Jesus forgave him as he did others during his earthly ministry such as the adulterous woman. His forgiveness has nothing to do with OT law, it was simply done as Jesus determined it to be while the OT was in effect. Even if the thief was baptized, it would have been unto John's baptism which wasn't a one time event as being baptized into Christ is. John's baptism would have had to been repeated upon committing new sin, not so with baptism into Christ.
I hope you don't mind my pointing out that, to say that the thief was merely forgiven of his sins is an argument from silence. That context says nothing about forgiveness of any sins for that thief nor any relationship to the adulterous woman. The adulterous woman was forgiven of her sins before that Cup was passed to mankind.
The baptism of the Holy Ghost happened to the apostles on the day of Pentecost as promised to them by Jesus as part of the power from on high as recorded in Luke 24:49. That baptism was unique to them. Gifts of the Spirit were subsequently manifested by the laying on of the apostle's hands.
Except that when John spoke of Holy Spirit and fire batptism, he was not talking to the disciples, who had not yet even been approached by Christ and told to follow Him. He was speaking to the common folk whom he had baptized with water unto repentance.
Who was Matt 3:11 being addressed to? Go back to 3:7; the Sadducees and Pharisees, and John referred to them as a generation of vipers! So, what does Matt 3:11 really mean?
Matthew 3:8 Bring forth therefore fruits meet for repentance:
When John pointed his finger of accusation at the scribes and Pharisees, he was speaking also expansively for the sake of all his hearers and for their benefit, when addressing the Pharisees as vipers and such. He never stopped speaking to and for the benefit of aLL the people standing about him, within earshot.
MM