Searcher:
Concerning the idea that the NT is only written for a relatively tiny class of Christians, here are some verses that I think trump that idea:
(2 Timothy 3:16, 17) . . .All Scripture is inspired of God and beneficial for teaching, for reproving, for setting things straight, for disciplining in righteousness, 17 that the man of God may be fully competent, completely equipped for every good work. . .
Here, "all Scripture" is for "the man of God."
(1 Corinthians 10:11) . . .Now these things went on befalling them as examples, and they were written for a warning to us upon whom the ends of the systems of things have arrived.
Here the things "written," Bible examples, were meant "for a warning to us upon whom the ends of the systems of things have arrived. That would certainly include the "great crowd" who "come out of the great tribulation." (Rev 7:14)
(Acts 17:30) . . .True, God has overlooked the times of such ignorance, yet now he is telling mankind that they should all everywhere repent.
"God" is "now" (even in the 1st century when Paul was speaking this) "telling mankind that they should all ... repent." That would necessarily include more than the 144,000.
You are right to think of this idea as a big lie. Compounding their lie is their hypocrasy of saying that it doesn't apply but judicially enforcing it upon those to whom they say it doesn't apply. They want it both ways. "The promises and the forgiveness and the mediatorship don't apply to you, but you still need to do the preaching and everything else we say."
It's interesting to take Pauls words of judgment to Peter:
(Galatians 2:14) . . ."If you, though you are a Jew, live as the nations do, and not as Jews do, how is it that you are compelling people of the nations to live according to Jewish practice?"
Now, let's reword them. "Jew"="Anointed Christian," "Nations"=Great Crowd."
(Galatians 2:14) . . ."If you, though you are an anointed Christian, live as the great crowd does, and not as anointed Christians do, how is it that you are compelling people of the great crowd to live according to anointed Christian practice?"
Paul was right to call it "hypocrasy." But in fact, they are not concerned about "anointed Christians." They are concerned with their own power base. This idea of a "faithful and discreet slave class" is just like the image of the wizard of oz, just a smoke screen. Anyone who claims to be an "anointed Christian" outside of themselves is called into question. But don't dare question their calling.
Take Care