That is not the Last Trump, it is God speaking unto the 7 (Divine Completion) Churches of the Church Age period.
Rev. 1:10 I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet,
11 Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Rev. 1 is John seeing Jesus in all of his glory. Rev. 2 & 3 is the Church Age, Rev. 4-19 is the 70th week hereafter. That merely signifies Jesus' authority, he speaks as a Trump quivers.
As per the Feasts, yes they are for Israel, but Israel lives in this world, they are God SHOWING Israel their course in this world at every turn. They birth the Messiah/Redeemer, he dies (Passover) for "Their sins" and we were grafted in. He knows NO SIN (He was the son of God, he was thus as Unleavened Bread without sin). Jesus then destroyed death and was the First-fruits of the grave. Jesus then became the High Priest of the "Gentile Harvest" season (Church Age/Pentecost or Feast of Weeks) in which Jews also come to know the Messiah, and the church was built up by Jesus' Jewish Disciples. The Feast of Trumps end the Harvest of Souls, thus happens in Rev. 4:1 where Jesus calls the Church home. Both Jews and Gentiles get Harvested & Raptured via the Dead and the living being taken to Heave to marry the Lamb (Jesus). Now during the 70th week Israel must ATONE just as Dan. 9:24-27 states, and they do as Zech. 13:8-9 says, just before the DOTL (Zech. 14:1) and thus this fulfills the Day of Atonement. Finally we see the Jews dwelling with Jesus for 1000 years during the Kingdom Age fulfilling the Feast of Tabernacles.
The 7 Feasts are about Israel and the whole world she lives in, the Passover was Jesus dying for us all, Jesus not having ever sinned allows us all to be forgiven, Jesus overcoming death allows us all to overcome the curse of death Adam fell into, the Church Age is about both Jews an Gentiles, thus the Harvest concerns us all. The Rapture of the Church with both Jews and Gentiles concern us all, the Atonement of Israel concerns only them, the mostly Gentile Church is in Heaven by this time, God needs a Seed of Abraham saved so Jesus can fulfill God's Promises unto Abraham. Jesus dwell with Israel during the Kingdom Age, not Gentiles. So, the Feasts are about us all, until we are Raptured, then the last two Feasts are about Israel only. So, its more complex than most people realize. Its God foretelling the whole History of the world, as a matter of fact "Holy Convocations" simply means Dress Rehearsals.
But by that time the Last Trump (Harvest Trump) has sounded, you are conflating Judgment Trumps with the Last Trump if the Harvest which ends the harvest season (Church Age).
The mistake people make is in THE TIMING, its the most important thing, yet most people to not grasp this. Zech. 13:8-9 shows Israel repents just before the DOTL arrives in Zech. 14:1, thus the Rev. 8 Trumps happen just after Israel (144,000 is a code) repents and flees Judea. So, Israel repents before Judgment comes as Zech. shows.
The Fire is merely the incoming Asteroid that God has preordained to hit us long ago, on April 13, 2029 (DOTL) The Angels can not sound until the 7th Seal is loosed. The 7 Seals are merely God/Jesus foretelling us what the Trumpet Judgments bring, 7 = divine completion. All of the judgments are in the 7 Trumps. No judgments are in the 7 seals.
