Which is your stumbling block. The 2nd Coming prophecy is a parable/prophecy fulfilled in heaven after the 1,000 yrs reign in heaven, the fulfillment of the Olivet Discourse, when "those were standing there" during the Olivet Discourse tasted death in the lake of fire in heaven. Yours and Christianity's stumbling block is not recognizing the fact that there are 3 resurrections. The 3rd resurrection being the "Wheat and Tares" resurrection, where and when the earth will be reaped, the righteous into the barn which is the New Yahrushalem and the wicked straight into the lake of fire. That's separates the 3rd resurrection from the 2nd, the fact there will be no throne judgement in the 3rd resurrection.
More heresies as there is nothing mentioned about any of this in the Olivet Discourse. There were no others, but only the disciples who were with Jesus as He answered their three questions, when shall these things be? and what shall be the sign of thy coming, and of the end of the world? Jesus proceeds to tell them those things which must come first before His return, Matthew 24:4-28 and in Matthew 24:29-31 shows them what to look for in His second coming.
Matthew 24:1 And Jesus went out, and departed from the temple: and his disciples came to him for to shew him the buildings of the temple.
Matthew 24:2 And Jesus said unto them, See ye not all these things? verily I say unto you, There shall not be left here one stone upon another, that shall not be thrown down.
Matthew 24:3 And as he sat upon the mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? and what shall be the sign of thy coming, and of the end of the world?
Matthew 24:4 And Jesus answered and said unto them, Take heed that no man deceive you.
Rev 19:11-21 is that of Christ second coming that was mentioned in Matthew 24:29-31 as at that time on the last day He will destroy the beast and the false prophet, casting them alive into the lake of fire, and the lake of fire is not in heaven for no evil can exist in the Spiritual realm of God. At His second coming He will also send His angels out to the four corners of the earth to gather all that are His own that are in the grave, John 5:28, 29; John 6:40, Matthew 24:29-31, and those alive at His coming as they will evermore be with the Lord. Then God ushers down the new heaven and the New Jerusalem after He cast all those who rejected truth, casting them into the lake of fire.
Either you believe what Jesus has already taught and have eternal life with Him, or you reject His truths and find yourself in the lake of fire with all those false teachers that are teaching you these heresies.
John 5:28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice,
John 5:29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.
John 6:40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day.