You fail to notice what Peter preached before the believers asked, "What shall we do?"
He used facts of the death and resurrection of the Lord Jesus to prove the deity of Jesus and the fact that he is the promised Messiah. Peter ended his sermon with the following words:
"Therefore let all the house of Israel know assuredly, that God hath made the same Jesus, whom ye have crucified, both Lord and Christ" (Acts 2:36).
Dr. Stanley D. Toussaint, Senior Professor Emeritus of Bible Exposition at Dallas Theological Seminary (Acts 2), writes the following commentary on Acts 2:36:
"Here is the conclusion to Peter's sermon. The noun 'Lord', referring to 'Christ', probably is a reference to Yahweh. The same word 'kyrios' is used of 'God' in verses 21, 34, and 39 (cf. Phil. 2:9). This is a strong affirmation of Christ's deity" (The Bible Knowledge Commentary; New Testament, ed. Walvoord & Zuck, [ChariotVictor Publishing, 1983], 359).
The Jews who believed that Jesus is Christ, God come in the flesh, were "born of God". Dr. Zane Hodges, past Chairman of of the New Testament Department at Dallas Theological Seminary, writes the following in regard to Peter's words:
"Peter concludes his address with the assertion that 'God has made this Jesus, whom you have crucified, both Lord and Christ' (2:36). His hearers then reply, 'Men and brethren, what shall we do?' (2:37). But such a reaction presumes their acceptance of Peter's claim that they have crucified the one who is Lord and Christ. If this is what they now believe, then they were already regenerated on Johannine terms, since John wrote: 'Whoever believes that Jesus is the Christ is born of God' (1 John 5:1; cf. John 20:31)" [emphasis added] (Hodges, The Gospel Under Siege, 101).
Here are the verses to which Hodges makes reference:
"Whosoever believeth that Jesus is the Christ is born of God...Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?" (1 Jn.5:1,5).
On the day of Pentecost those who believed the "good news" that
Jesus is the Christ, the Son of God, were "born of God" and saved. Even today those who believe that truth receive "life" through His name:
"Jesus performed many other signs in the presence of his disciples, which are not recorded in this book. But these are written that you may believe that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name" (Jn.20:30-31).
This is the "good news" of
Christ which was first preached to Jews and by which they were saved and it is not the same "good news" of Christ which he preached to the Gentiles:
"Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures" (1 Cor.15:1-4).
If you cannot tell the difference between these two gospels then your spiritual IQ is ZERO!
Your spiritual IQ of OT prophecies that Messiah would fulfill are 0 !
YOU are creating divisions in CHRIST-Messiah-Jesus that do NOT exist there is only ONE gospel and that one gospel revolves around the prophesied Messiah Jesus whom you DIVIDE into factions that do NOT exists in scripture.
Peter, Paul , and John are saying the same thing ! Messiah is same as anointed which is the same as Christ. You cannot see the trees for the forest.
Old Testament Scriptures That Describe The Coming Messiah
The Messianic Prophecy (paraphrased) Where the prophecy appears in the Old Testament (written between 1450 BC and 430BC) Jesus’ fulfillment of the prophecy in the New Testament (written between 45 and 95 AD)
The Messiah will be the offspring (descendant) of the woman (Eve) Genesis 3:15 Galatians 4:4
The Messiah will be a descendant of Abraham, through whom everyone on earth will be blessed Genesis 12:3; 18:18 Acts 3:25,26
The Messiah will be a descendant of Judah Genesis 49:10 Matthew 1:2 and Luke 3:33
The Messiah will be a prophet like Moses Deuteronomy 18:15-19 Acts 3:22,23
The Messiah will be the Son of God Psalm 2:7 Matthew 3:17; Mark 1:11; Luke 3:22
The Messiah will be raised from the dead (resurrected) Psalm 16:10,11 Matthew 28:5-9; Mark 16:6; Luke 24:4-7; John 20:11-16; Acts 1:3 and 2:32
The Messiah crucifixion experience Psalm 22 (contains 11 prophecies—not all listed here) Matthew 27:34-50 and John 19:17-30
The Messiah will be sneered at and mocked Psalm 22:7 Luke 23:11,35-39
The Messiah will be pierced through hands and feet Psalm 22:16 Luke 23:33 and 24:36-39;
John 19:18 and 20:19-20,24-27
The Messiah’s bones will not be broken (a person’s legs were usually broken after being crucified to speed up their death) Psalm 22:17 and 34:20 John 19:31-33,36
Men Will Gamble for the Messiah’s clothing Psalm 22:18 Matthew 27:35; Mark 15:24; Luke 23:34; John 19:23,24
The Messiah will accused by false witnesses Psalm 35:11 Matthew 26:59,60 and Mark 14:56,57
The Messiah will be hated without a cause Psalm 35:19 and 69:4 John 15:23-25
The Messiah will be betrayed by a friend Psalm 41:9 John 13:18,21
The Messiah will ascend to heaven (at the right hand of God) Psalm 68:18 Luke 24:51; Acts 1:9; 2:33-35; 3:20-21; 5:31,32; 7:55-56; Romans 8:34; Ephesians 1:20,21; Colossians 3:1; Hebrews 1:3; 8:1; 10:12; 12:2; 1 Pet 3:22 . . . sorry, we got carried away!
The Messiah will be given vinegar and gall to drink Psalm 69:21 Matthew 27:34; Mark 15:23; John 19:29,30
Great kings will pay homage and tribute to the Messiah Psalm 72:10,11 Matthew 2:1-11
The Messiah is a “stone the builders rejected” who will become the “head cornerstone” Psalm 118:22,23 and Isaiah 28:16 Matthew 21:42,43; Acts 4:11; Ephesians 2:20; 1 Peter 2:6-8
The Messiah will be a descendant of David Psalm 132:11 and Jeremiah 23:5,6; 33:15,16 Luke 1:32,33
The Messiah will be a born of a virgin Isaiah 7:14 Matthew 1:18-25 and Luke 1:26-35
The Messiah’s first spiritual work will be in Galilee Isaiah 9:1-7 Matthew 4:12-16
The Messiah will make the blind see, the deaf hear, etc. Isaiah 35:5-6 Many places. Also see Matthew 11:3-6 and John 11:47
The Messiah will be beaten, mocked, and spat upon Isaiah 50:6 Matthew 26:67 and 27:26-31
The “Gospel according to Isaiah” Isaiah 52:13-53:12 Matthew, Mark, Luke, John
People will hear and not believe the “arm of the LORD” (Messiah) Isaiah 53:1 John 12:37,38
The Messiah will be rejected Isaiah 53:3 Matthew 27:20-25; Mark 15:8-14; Luke 23:18-23; John 19:14,15
The Messiah will be killed Isaiah 53:5-9 Matthew 27:50; Mark 15:37-39; Luke 23:46; John 19:30
The Messiah will be silent in front of his accusers Isaiah 53:7 Matthew 26:62,63 and 27:12-14
The Messiah will be buried with the rich Isaiah 53:9 Matthew 27:59,60; Mark 15:46; Luke 23:52,53; John 19:38-42
The Messiah will be crucified with criminals Isaiah 53:12 Matthew 27:38; Mark 15:27; Luke 23:32,33
The Messiah is part of the new and everlasting covenant Isaiah 55:3-4 and Jeremiah 31:31-34 Matthew 26:28; Mark 14:24; Luke 22:20; Hebrews 8:6-13
The Messiah will be our intercessor (intervene for us and plead on our behalf) Isaiah 59:16 Hebrews 9:15
The Messiah has two missions Isaiah 61:1-3 (first mission ends at “. . . year of the LORD’s favor”) First mission: Luke 4:16-21; Second mission: to be fulfilled at the end of the world
The Messiah will come at a specific time Daniel 9:25-26 Galatians 4:4 and Ephesians 1:10
The Messiah will be born in Bethlehem Micah 5:2 Matthew 2:1 and Luke 2:4-7
The Messiah will enter Jerusalem riding a donkey Zechariah 9:9 Matthew 21:1-11
The Messiah will be sold for 30 pieces of silver Zechariah 11:12,13 Matthew 26:15 with Matthew 27:3-10
The Messiah will forsaken by His disciples Zechariah 13:7 Matthew 26:31,56
The Messiah will enter the Temple with authority Malachi 3:1 Matthew 21:12 and Luke 19:45
http://www.clarifyingchristianity.com/m_prophecies.shtml
No need to reply I have had more than enough of Jerryology.