We agree that "Thousand Years" is symbolic, you somewhat want to bring these words to a literal representation from the time of Jesus to the end representing 2,000+ literal years of church history and tribulation (100% Wrong)
Time, which a/the thousand years symbolizes is given to earth, but time does not exist in eternity, which the realm of heaven is. Yes, within a thousand years is when all who have been born again live and reign with Christ during our physical life and continue to live and reign with Him a spiritual body when we physically die, many during this time shall be martyred for their faith.
And this is the same symbolic period of time that Satan is bound. There is no exact number of years, rather a/the thousand years symbolically refers to however long it takes for the spiritual Kingdom of God in heaven to be complete as the Gospel of the Kingdom of God is proclaimed to all the nations of the world, and whosoever believes is born again of the Spirit both knowing and entering into the Kingdom of God that is within born again believers. Yes, to date, a thousand years represents TIME from the first coming of Christ that will end when the last/seventh trumpet sounds the Kingdom of God (mystery) is complete. (Rev 10:5-7)
Conclusion: You deny that seen below as future literal, the beheaded souls of the saints will come out of this future 3.5 year great tribulation you deny will take place, the words (Thousand Years) means nothing more than a explanation to mortal humans of God's time in the spiritual being eternal
The martyred souls never return to physical life within this time symbolized a thousand years. They are forever with Christ in eternity, the spiritual body, living souls waiting in heaven for the Kingdom of God to be complete, at which time the final trumpet will begin to sound that this time, symbolized a/the thousand years has ended and Satan will be set free for a "little season." After Satan has his little season, the saints still physically alive, as well as those physically dead will be caught up to meet the Lord in the air, and fire will come down from God out of heaven to burn up all that is still left alive on the earth, the devil and those with him, beast and false prophet cast alive into the lake of fire and shall be tormented day and night for ever and ever.
Why are you limiting great tribulation to 3.5 years? Because Christ tells his disciples from the Mt of Olives that great tribulation will come to the saints as the Gospel of the Kingdom of God is proclaimed unto all the nations of the world.
Matthew 24:14 (KJV) And
this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
Matthew 24:21 (KJV) For
then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
Great tribulation began for faithful saints in the first century AD, and multitudes throughout the ages have been martyred as the Kingdom of God is being built.
Future, Literal, That You Deny Will Take Place?
First you said thousand years are symbolic, now are you saying thousand years will be literal in the future?
There will be a future time of great tribulation, it will last for 3.5 literal years upon this earth, there will be a future human man who will be John's (The Beast), in the future there will be (Two Witness) who will bring literal plagues upon this earth, they have literal physical bodies that die and will lay in a literal Jerusalem street as the unsaved world celebrates their death exchanging literal gifts, they will be raised from the dead as a literal world watches as the final hours of earth's existence unfolds
Why would you deny great tribulation has already come for many saints of the past who have been martyred for their faith? How can you place great tribulation to 3.5 years in the future since many born again believers have been, are being, and shall continue to suffer great tribulation for being faithful to Christ? It seems you lack understanding of the two witnesses and all that unfolds as they preach the Gospel of the Kingdom of God through Christ unto all the nations of the world during this time symbolized a/the thousand years.