The gospel of the kingdom was not interrupted by the gospel of grace. That is being taught in some mostly Baptist churches, but I can prove it is wrong.
And Paul dwelt two whole years in his own hired house, and received all that came in unto him, Preaching the kingdom of God, and teaching those things which concern the Lord Jesus Christ, with all confidence, no man forbidding him. Acts 28:30,31
This wrong teaching goes hand in hand with the false idea Jesus preached about the kingdom and Paul about the church. It is another way of claiming portions of NT scripture don't apply to us.