Since the early days of the church, people have tried to deny the Incarnation and still call themselves Christians. The little letter of 2 John is an answer to them and a reaffirmation of the truth about God in the flesh.
While David used desperate and even deceptive means of escape, God provided for him because of his grace and faithfulness.
Although many Jews did not believe the gospel and many non-Jews did, everyone who calls on the name of the Lord will be saved.
Because of a general persecution in Jerusalem, the believers were scattered and took the gospel to Judea and Samaria, where many believed in Christ.