I suppose it's too much to expect you to look at the underlying logic of that statement on your own, so I'll just lay it out for you.
Based on what you've said about the "Gospel of the Kingdom," you're basically telling us that the Gospels aren't even Christian!
I can't believe that's what you actually think -- but it is the logical consequence of what you're actually saying.
The Gospel of the Grace of God was given to Paul. By Jesus Christ. It's about a BODY being established. The Church the Body of Christ. But please, don't take my word. Read God's Word.
I cannot help it if you do not like what God's Word plainly says. It's HIS PLAN, NOT OURS>
The Gospels are Jewish...In fact, the entire bible is Jewish...
God reached down in the middle of the New Testament and pulled up a Jew to mess with the heads of the rest of the Jews and He created His church made up of forbidden Gentiles and anyone else who would join it...