What will be the cause of the great tribulation?

[Oseas3]

There isn't anything talked about in the Bible about any future 'tribulation', other than that which concerns His people and Jesus' churches throughout The New Testament Era of The Church Age,

Actually, it is your demonic interpretation that has nothing to do with the Bible, there is a lot of BIBLICAL prophecy talking about the tribulation in the END of the times, by the prophets in the OT,
and by JESUS in His Gospel, Gospel of GOD's Kingdom->Revelation 11:15-18 combined with 1Corintians 15:24-28&51-55, and Philippians 3:30-21,
-> and by the Apostles,
and by the true Church, the body of Christ JESUS through out the last 2000 years->Hebrews 1:1-4 and 8, ->
and AS IS WRITTEN in Acts 14:22, " we MUST through much tribulation enter into the Kingdom of GOD->Revelaton 11:15-18 combined with Daniel 2:43-45 and 7:9-10 and 22; 26-27.

Your thinking is from a human perspective, a stumbling block, not from GOD's perspective. The natural man receiveth not the things of the Spirit of GOD, neither can he know them, because they are spiritually discerned.

This was a Prophetic warning to the Jews about the tribulation which took place when the Temple was destroyed, in A.D. 70.

This refers to the destruction of Jerusalem in A.D. 70, also.

This is also speaking of the Romans attacking Jerusalem in A.D. 70, with Jesus using them to bring Wrath upon the ones who crucified Him.

I know you may not care to hear this kind of talk, but said;

All of the misunderstanding begins in Revelation 20:4 where nothing is mentioned about Jesus Reigning on Earth for a thousand years and the galactic volume of meaningless drivel man has fabricated from that in their flesh, in its entirety, out of thin air.

No, what you said is a false testimony, of course:->Matthew 15:11and 18-19.->The disciples privately they asked unto my Lord JESUS, saying:-> Matthew 24:3: -> Tell us, what shall be the sign of THY COMING, and of the END of the WORLD->the current Devil's WORLD? JESUS listed several terrible EVENTS for this CURRENT TIME- firstly as is written in Matthew 24:4-14, take a look.

And still about the END of the current Devil's world, the EVENT that my Lord also said upon the Mount of Olives, it is written in Matthew 24:15-25. Be prepared or else get ready. What my Lord JESUS revealed to the disciples about the END of this current Devil's world, as above cited, it has nothing to do with your A.D 70, your world will be DESTROYED as a whole from now on, understand? 1Corinthians 15:24-28 and 51-55 combined with 1Thessalonians 4:16 and REvelation 11:15-18.

Revelation 21:8;-> But the unbelieving, and all liars, and fearful, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, shall have their part in the lake which burneth with fire and brimstone: which is the second death.->Brimstone? Isaiah 30:33, take a look).