random person said in post 3:
. . . flesh and blood can not inherit the kingdom of God . . .
1 Corinthians 15:50 refers to people in mortal/corruptible flesh and blood bodies, as opposed to people in immortal/incorruptible resurrection "flesh and bone" bodies (possibly without blood as we know it) like Jesus was resurrected into on the 3rd day after his death (Luke 24:39,46; 1 Corinthians 15:3-4,21-23,51-53, Philippians 3:21, Romans 8:23-25).
1 Corinthians 15:50 means that people in mortal bodies won't inherit the eternal (as opposed to the millennial) aspect of the kingdom of God, which will be on the new earth, in the descended New Jerusalem (Revelation 21:1 to 22:15), after the future millennium and subsequent events (Revelation 20:7 to 22:15).
1 Corinthians 15:50 doesn't require that no people in mortal bodies will inherit the millennial aspect of the kingdom, which will be on the present earth. For the elect Jews who won't become believers until Jesus' 2nd coming (Romans 11:25-29, Zechariah 12:10-14) could inherit the millennial aspect of the kingdom (Zechariah 14:5-21, Matthew 19:28, Luke 22:30) in their mortal bodies. For the resurrection/changing of believers into immortal physical bodies (1 Corinthians 15:21-23,51-53) could be experienced only by those who had become believers before the 2nd coming.
Also, 1 Corinthians 15:50 doesn't require that no people in mortal bodies will even
enter the millennial aspect of the kingdom, i.e. without inheriting it. For just as people can enter someone's house and stay there for awhile without inheriting that house, so the people left alive at the 2nd coming (Matthew 24:39b-40) who won't get saved at that time will enter the millennial aspect of the kingdom in their mortal bodies without inheriting the kingdom. Instead, they will be its forced subjects (Zechariah 14:16-19, Psalms 66:3), ruled over with a rod of iron by Jesus and the physically resurrected church (Revelation 2:26-29, Revelation 5:10, Revelation 20:4-6, Psalms 2).
Similarly, 1 Corinthians 15:50 doesn't require that no people in mortal bodies can even enter the 3rd-heaven aspect of the kingdom, i.e. without inheriting it. For at the time of Revelation 11:11-12, at one point during the tribulation, the 2 witnesses will be in resuscitated mortal bodies, like the resuscitated mortal bodies of Lazarus and Tabitha (John 11:43-44, Acts 9:36-40). For the resurrection of believers into immortal physical bodies won't happen until Jesus' 2nd coming (1 Corinthians 15:21-23,52-53; 1 Thessalonians 4:15-16, Revelation 19:7 to 20:6), which won't occur until after the future tribulation of Revelation chapters 6 to 18 and Matthew 24 (Matthew 24:29-31, Revelation 19:7 to 20:6). And when Revelation 11:12 shows that the 2 witnesses will ascend up to the 3rd heaven in their resuscitated mortal bodies, it doesn't say that they will inherit the 3rd heaven, just as when Paul says that he at one point during his lifetime could have been taken to the 3rd heaven in his mortal body (2 Corinthians 12:2-7), he doesn't say that he inherited the 3rd heaven, and just as when Enoch and Elijah were taken to the 3rd heaven in their mortal bodies (Hebrews 11:5; 2 Kings 2:11), it doesn't say that they inherited the 3rd heaven.
random person said in post 3:
. . . neither is there any marriages (or births) because we shall be like the angels . . .
Matthew 22:30 can mean that resurrected humans won't marry, like angels don't marry. It doesn't contradict that the church will be resurrected (if dead) or changed (if alive) into immortal flesh bodies at Jesus' 2nd coming, just as he was resurrected into an immortal flesh body on the 3rd day after his death (Luke 24:39,46; 1 Corinthians 15:3-4,21-23,51-53, Philippians 3:21, Romans 8:23-25).