The twelve preached the kingdom gospel of the earthly Davidic kingdom (
Matthew 4:23 Luke 9:2 Luke 9:6).
This is not quite true.
Let’s examine Matthew 4:23 as a starting point.
The verse itself says: ”
Jesus was going throughout all Galilee, teaching in their synagogues and proclaiming the gospel of the kingdom, and healing every kind of disease and every kind of sickness among the people.”
So the first point is that JESUS was doing the preaching and not the Twelve in that verse.
Here is the last few verses of Matthew 4 and the first few verses of Matthew 5 to see how events and the message unfold ...
[Mat 4:23-25 NASB]
23 Jesus was going throughout all Galilee, teaching in their synagogues and
proclaiming the gospel of the kingdom, and healing every kind of disease and every kind of sickness among the people.
24 The news about Him spread throughout all Syria; and they brought to Him all who were ill, those suffering with various diseases and pains, demoniacs, epileptics, paralytics; and He healed them. 25 Large crowds followed Him from Galilee and [the] Decapolis and Jerusalem and Judea and [from] beyond the Jordan.
[Mat 5:1-12 NASB]
1 When Jesus saw the crowds, He went up on the mountain; and after He sat down, His disciples came to Him. 2 He opened His mouth and [began] to teach them, saying,
3 "Blessed are the poor in spirit, for theirs is
the kingdom of heaven.
4 "Blessed are those who mourn, for they shall be comforted.
5 "Blessed are the gentle, for they shall
inherit the earth.
6 "Blessed are those who hunger and thirst for righteousness, for they shall be satisfied.
7 "Blessed are the merciful, for they shall receive mercy.
8 "Blessed are the pure in heart, for they shall
see God.
9 "Blessed are the peacemakers, for they shall be called
sons of God.
10 "Blessed are those who have been persecuted for the sake of righteousness, for theirs is
the kingdom of heaven.
11 "Blessed are you when [people] insult you and persecute you, and falsely say all kinds of evil against you because of Me. 12 "Rejoice and be glad, for
your reward in heaven is great; for in the same way they persecuted the prophets who were before you.
I think that the people may have had a suspicion that Jesus was talking about something bigger than an earthly Davidic kingdom.