I already addressed Romans 1:15-16 and at Acts 17:1-4 Paul says nothing about the Lord Jesus dying for our sins.
But you refuse to address what I said here:
To the Jews Paul preached the good news or gospel that Jesus is the Christ, the Son of God (Acts 9:20-22). And the Jews who believed that truth were born of God and received life the moment when they believed (1 Jn.5:1-5; Jn.20:31).
To the Gentiles Paul preached a gospel or the good news that Jesus died for our sins (1 Cor.15:3) and those who believed that truth were saved the moment when they believed.
Anyone with the slightest degree of spiritual discernment knows that the "good news" that the Lord Jesus died for our sins is not the same "good news" that Jesus is the Christ, the Son of God.
But to you they are the same!
This is like visiting a Messianic Church, listening to maybe 20 minutes worth of a message on "Jesus the Messiah the Son of God" then going to the "Pauline Gentile Church" next door listening to a small portion of the message about "Jesus dying to Forgive our sins" and concluding that the two Churches have completely different messages.
Drawing such sweeping conclusions on the basis of what was NOT said in short sermons is not very impressive especially if we find that the "pastors" actually understood the teachings of the death of Christ. We must remember that a great deal is being taught especially at the Messianic Church where there were 12 full time ministers on staff. So what did the Apostles know? Were they really, as you claim, unacquainted with the highly important doctrines concerning Jesus work on the cross? Looking back on their training with Jesus and the statements they made in their own writings I found out the following.
1. John the Baptist had revealed to several of them at least that Jesus was the Lamb that takes away the sin of the world (
John 1:29). That says a lot in itself.
2. Jesus had told them many times He would suffer, die, be buried and, after three days rise again
(Matt. 12:40 Matt 16:21 Matt 26:61 John 2:19-22)
3. The idea of Christ being the ransom, the blood payment for sin had been taught to them not by Paul but by Jesus during His earthly ministry (
Matthew 20:26-28). Peter and John write about this fact in their letters (
1 Peter 1:18-20, 1 Peter 2:24 ) and John (
1 John 1:7, 1 John 4:10)
4. After the Resurrection Jesus walked them through
all the scriptures that spoke of Him. He also
opened their minds so they could have spiritual understanding Luke 24:44-45
5. "All the scriptures" would certainly have included key Messianic prophecies like
Isaiah 53:4-6 . This passage shows that the death of Christ would bring about the forgiveness of sin and bring peace with God.
6. The idea that His sacrifice would bring about the Birth of the New Life within had also been taught by Jesus and passed on by the Apostles (
John 3:3,1 Peter 1:23, 1 Peter 3:18-22, 1 John 1:7)
7. The prophet Jeremiah announced that God would make a new covenant with Israel which would result in the forgiveness of sins. (
Jeremiah 31:31-3). In covering the scriptures pertaining to Him in the prophets Jesus would have included this as well. To reiterate this through all generations He instituted the covenant supper: In the same way, after the supper he took the cup, saying,
"This cup is the new covenant in my blood, which is poured out for you. (
Luke 22:20).
There was absolutely no reason to suppose that Messianic believers did not have access to such teaching through the Apostles who, ny that time understood that the vicarious death of Christ atoned for the sins of mankind. Simply because it was not mentioned in a handful of sermons not does not negate what they knew.