19 Therefore thus saith the Lord Jehovah: Because ye are all become dross, therefore, behold,
I will gather you into the midst of Jerusalem. [Josephus - 1.1 million perished in Jerusalem alone 70 AD]
20 As they gather silver and brass and iron and lead and tin into the midst of
the furnace, to blow the fire upon it, to melt it; so will I gather you
in mine anger and in my wrath, and I will lay you there, and melt you.
21 Yea, I will gather you, and blow upon you with
the fire of my wrath, and ye shall be melted in the midst thereof.
22 As silver is melted in the midst of
the furnace, so shall ye be melted in the midst thereof; and ye shall know that I, Jehovah, have
poured out my wrath upon you. Ezek 22
Every time God's wrath or displeasure is in view does require it to be all about eternal consequences. Fire is the most common symbol of God's wrath in the scriptures, and the short simile given in vv.7-8 is corporate, pertaining to apostate Israel which is what these Hebrews were falling away back to, thus crucifying Christ again.
7 For
the land [Gr., gh] which hath drunk the rain that cometh oft upon it, and bringeth forth herbs meet for them for whose sake it is also tilled, receiveth blessing from God:
8 but if it beareth thorns and thistles, it is rejected and nigh unto a curse;
whose end is to be burned. Heb 6
49
I came to cast fire upon the earth [the land; Gr., gh]; and what do I desire, if it is already kindled?
51
Think ye that I am come to give peace in the earth [the land, Gr., gh]? I tell you, Nay; but rather division:
56 Ye hypocrites, ye know how to interpret the face of the earth
[the land, Gr., gh] and the heaven; but how is it that ye know not how to interpret this time?
52 for there shall be from henceforth five in one house
divided, three against two, and two against three.
53 They shall be divided, father against son, and son against father; mother against daughter, and daughter against her mother; mother in law against her daughter in law, and daughter in law against her mother in law. Lu 12 [ Zechariah 11:6]
Here we see the fire of God's wrath was manifested as 'division', which if you've studied the civil war that broke out among them 66-70 AD you know that more Jews were killed by Jews than by the Romans.
That's the immediate fate of those falling away, "a certain fearful expectation of judgment, and a fierceness of fire which shall devour the adversaries" (10:27). How many were hell bound to begin with, who knows, but this:
4 And I heard another voice from heaven, saying,
Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues. Rev 18
....clearly implies that His people could be in danger of 'the fire that was intended for the adversaries'.
31 In that day, he that shall be on the housetop, and his goods in the house, let him not go down to take them away: and let him that is in the field likewise
not return back.
32 Remember Lot`s wife. Lu 17