Peter was there when Jesus said the following:
Matthew 26:28
28 [JESUS]For this is my blood of the new testament, which is shed for many for the remission of sins.[/JESUS] |
You need to prove that Peter understood that testament of Christ and then prove Peter believed it.
Act 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Peter did not deliver the message of the new testament for remission at Pentecost but he preached the message of John the baptist...
Mar 1:4 John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
Mar 1:5 And there went out unto him all the land of Judaea, and they of Jerusalem, and were all baptized of him in the river of Jordan, confessing their sins.
Mar 1:7 And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose.
Mar 1:8 I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.
Edit: Peter at Pentecost and John's baptism were in water for remission and had no blood in it. No reference to the death of Christ for remission.
Christ Jesus said:
Mat 26:28 For this is my blood of the new testament, which is shed for many for the remission of sins.
Amazing that Christ's message of His blood wasn't clearly stated at Pentecost being it was the most important message ever delivered by Christ.