This is an article in response to a group that is commonly referred to as hyper-Dispensationalist. Many of which would refer to their teach as the "gospel of Paul". This group argues that the apostle Paul was give a special dispensation to give the gospel to the Gentiles. This much is biblically based (read Galatians 2 and Ephesians 3).
So that Jesus and the apostles were not concerned about doctrines like justification by grace through Fsith alone. Instead they were focused on "the Gospel of the kingdom" as they delivered the gospel to the circumcised.
However hyper Dispensationalist take an extra step in this. They claim that there are in fact 2 gospels. As a result the writings of the apostles have no direct message to the believer today. In an extension to this further the writings of John were meant for the Jews only.
It is significant that John wrote this after the fall of Jerusalem. It is also significant that John was writing either amongst gentile converts in Ephesus or to thesis rounding cities from the island of Malta, in both cases these people were evangelized by Paul.
Yes, John the baptist preaches a baptism of repentance. But the apostle John doesn't mention it.
That is from the Synoptics for a reason.
In regards to John 3:16.
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
First of all John and Paul wrote Greek not English and several translations translate the word "shall"
Secondly, assuming that "should" is the proper translation it makes no difference for two reasons.
A. In John 3:17 John is telling Gentiles that "the world through him might be saved" meaning that the gospel John is preaching is available to them.
B. John 3:18 says "He that beleiveth is not condemned.." this is present tense. So Gentiles reading the gospel of John had a sure foundation for their salvation that no one could tear asunder.
John 4:23 has Jesus prophecy "But the hour cometh AND NOW IS, when the true worshippers shall worship the Father in spirit and in truth:"
John is not writing for the departed Israel, this not a lamentation this is the good news.
And church history records how John would minister to the Gentiles. One of his disciples was the martyr polycarp. And He had a disciple named Irenaeus whose association to John gave him the ability to make the open and shut case that John was the authentic gospel of John.
Paul stated that his gospel was that which was seen of the apostles
1 Corinthians 15:3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
4 And that he was buried, and that he rose again the third day according to the scriptures:
5 And that he was seen of Cephas, then of the twelve:
ephesians 3:5 Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit;
6 That the Gentiles should be fellowheirs, and of the same body, and partakers of his promise in Christ by the gospel:
galatians 2:9 And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we should go unto the heathen, and they unto the circumcision.
The gospel is not divided