The Remnant Jews

Matthew 24.13-31 will be the period of the last three and a half years of the Tribulation and addresses what will happen to the Jewish nation.
These Jewish believers are not in the Church, yet they are afflicted in Matt. 24.9.

There will be Jewish believers - a remnant promise kept similar to the Jewish disciples of Jesus though NOT as pillars of the Church which the disciples were also - in Jesus as the Messiah before the Tribulation starts. This is shown in Matt. 24.9. They preach the gospel of the kingdom as this gives the inhabitants of the world opportunity to escape (Rev. 3.10). We will be able to see and hear its coming, observing it closely. No one knows exactly the moment, but we know it is 3.5 years from its starting at Rev. 9.1. There is a remnant that are saved when Christ steps down on the mount of olives at Zech. 14.4; but proceeding this moment there shall be those Jewish remnants of Rev. 7.1-8 and the Two Witness, Elijah and Enoch.

Right now we are still in Matt. 24.7-8, commensurate with seals 2-4, and 5. Matt. 24.4-6 had already been fulfilled by 70 A.D.

What will the Jewish believers preach? that is, when will Jacob testify? See Psalms: 145.10-13; 96.3-4,10; and 68.9,11. For additional proofs that Jews shall be the ones who will bear such testimony to the nations is as follows: Isaiah 40.5-9 to "all flesh", 42.10 "Ye that go down to the sea, and all that is therein, the isles, and the inhabitants thereof" - these are the nations. Jacob says this (41.8, 42.1). If it were the Church as a testimony then it would be "unto all sinners", but instead it is unto "all the nations" (Matt. 24.14).

Note, the gospel of the kingdom is God's sovereignty with its healing the sick and casting out demons, while the gospel of grace pertains to sin and God's way of redemption. They are simply viewed from different perspectives, but they are the same gospel. There is only one gospel (Ga. 1.6-7).