Why did you not comment on what is found in the epistle to the Galatians in the first chapter? Not long after Paul was converted on the Damascus road he preached the following message to the Jews:
"And straightway he preached Christ in the synagogues, that he is the Son of God.....proving that this is the very Christ" (Acts 9:20,22).
At that time Paul had not yet received the gospel which he was to preach among the Gentiles. He wrote the following which is found in the first chapter of Galatians:
"But when God, who set me apart from birth and called me by his grace, was pleased to reveal his Son in me so that I might preach him among the Gentiles, I did not consult any man, nor did I go up to Jerusalem to see those who were apostles before I was, but I went immediately into Arabia and later returned to Damascus" (Gal.1:15-17).
When Paul received a gospel from the Lord Jesus on the Damascus road he immediately went to Damascus (Acts 9:6-8). But when he received the gospel which he preached among the Gentiles he went immediately into Arabia. That can only mean that two different gospels were preached during the Acts period.
It is you who is kookoo because according to your ideas even though the gospel which Paul preached to the Gentiles was kept secret since the world began it was revealed to the OT prophets:
"Now to him that is of power to stablish you according to my gospel, even the preaching of Jesus Christ according to the revelation of the mystery, which was kept secret since the world began, But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith" (Ro.16:25-26).
One flew over the cuckoo's nest and it was you and not me!