“Not according to Revelation. There is the first resurrection, and the rest of the dead are raised at the end of the universe.”
If this is true, then only those who live during the tribulation period could ever be saved. Everyone who is part of the second resurrection is damned, because they will be judged according to their works. It is even called the “resurrection of the wicked”, in Acts 24:15, and the “resurrection of judgement” in John 5:29.
The other, parallel verses that speak of the first resurrection clarify that it includes all believers, 1 Thes. 4:13-17 is probably the best example of that, because it speaks of all believers, both living and dead.
1 Thessalonians is clarified in 2 Thessalonians, especially chapter 2. Never read them separately.
3 Let no one in any way deceive you, for it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction, 4 who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God.
Acts 24:14&15 14 But this I admit to you, that according to the Way which they call a sect I do serve the God of our fathers, believing everything that is in accordance with the Law and that is written in the Prophets; 15 having a hope in God, which these men cherish themselves, that there shall certainly be a resurrection of both the righteous and the wicked.
“both the righteous and the wicked.”
John 5
24 “Truly, truly, I say to you, he who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life.
Two Resurrections
25 Truly, truly, I say to you, an hour is coming and now is, when the dead will hear the voice of the Son of God, and those who hear will live. 26 For just as the Father has life in Himself, even so He gave to the Son also to have life in Himself; 27 and He gave Him authority to execute judgment, because He is the Son of Man. 28 Do not marvel at this; for an hour is coming, in which all who are in the tombs will hear His voice, 29 and will come forth; those who did the good deeds to a resurrection of life, those who committed the evil deeds to a resurrection of judgment.
Jesus is speaking of the resurrection of all who died, righteous and unrighteous. It is inclusive. In Revelation, the first resurrection at His return includes only those who have died in faith, having been sealed by God.
Revelation 20
4 Then I saw thrones, and they sat on them, and judgment was given to them. And I saw the souls of those who had been beheaded because of [b]their testimony of Jesus and because of the word of God, and those who had not worshiped the beast or his image, and had not received the mark on their forehead and on their hand; and they came to life and reigned with Christ for a thousand years. 5 The rest of the dead did not come to life until the thousand years were completed. This is the first resurrection. 6 Blessed and holy is the one who has a part in the first resurrection; over these the second death has no power, but they will be priests of God and of Christ and will reign with Him for a thousand years.
I study book by book, cover to cover. Then I use a concordance. I read the whole chapter. If it is still discordant, I read the whole book.