Who will not have an opportunity to be saved by the 144,000 in the tribulation?
Those who have heard the gospel, contemplated it, understood it, and rejected it will not have an opportunity to be saved by the message of the 144,000. Once the Antichrist appears, they will be blinded and will immediately embrace him as the god of this world.
Les teaches that after the church has been removed and the Antichrist appears, there is one group who will not have an opportunity of salvation from the message of the 144,000. These are people who have heard the gospel, contemplated it, understood it, and rejected it. They had nothing to do with it. As soon as the Antichrist signs the treaty with Israel, they will be the first to acclaim him as the God of this world, the one they have been looking for. They will immediately be blinded and immediately embrace the man Antichrist. This matches the condemnation in verse 12: those who believed not the truth but had pleasure in unrighteousness. Les also points to Ephesians chapter 1 as using almost the same kind of language.