Hebrews was written to the messianic Hebrews, obviously.
The end is the day of Trumpets.
Its that moment that Paul alluded to in 1Corinthians 15, that happens in a twinkling of an eye when the entire Kehillah from Adam foreward (not a “church”) is saved by the grace of Yehova. The people that Faithfully kept his Torah to the end.
Its the day that we are changed (reborn) into Sons of Yehova (individual creations, rather than biologically reproduced beings) that can exist in the realm of Yehova.
Its that event that Yeshua explained to Nicodemus in John 3.
You (or is it your master Rood) are in error. Jesus was not referring to the Rapture of believers when He spoke to Nicodemus as cited in John 3. That you cannot grasp that is emblematic of a cult follower steeped in Roodian religion.