you went straight to the last verse so you can justify your belief.
here's the whole thing, in context.....
Revelation 20: 12-15
12 And I saw the dead, small and great, stand before God; and the books were opened : and another book was opened , which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
13 And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14 And death and hell were cast into the lake of fire. This is the second death. 15 And whosoever was not found written in the book of life was cast into the lake of fire.
I think you are referring to the "infants" thread started by somebody, and I am the one who said infants do not go to hell and are not judged according to their fallen nature.
Infants have NO WORKS, good or bad. They have a fallen nature, and unless they act and do works in accordance to that fallen nature they are not breaking any of God's laws, whether moral or otherwise.
With respect to your other scripture, John 3:8, he who does not believe is judged because his ACTIONS of unbelief are results of his fallen nature, and whether it is a judgment UNTO damnation or a judgment unto discipline is something else.
ACTIONS of unbelief???
That isn't even close to what Christ stated in John 3.
The example is given early when Nicodemus was told, "what is born of flesh is flesh, what is born of spirit is spirit. Marvel not, you must be born again."
The emphasis is NOT upon ACTIONS of unbelief, but upon belief. What is born of Spirit puts the emphasis upon God's authority, not humankind actions.
Further, the emphasis at the great white throne isn't on the "books" it is on the "book."
The books are just a review of the person's life. Though the Scriptures don't clearly state, I prefer the judgement books as showing documentation of the appeals made to be reconciled to God.
The books are certainly recorded deeds and the motivations, and are produced that all know the true life lived. That excuse making and political maneuverings are worthless at that judgement.
Were is the true emphasis? NOT on the "books!"
What actually is emphasized is shown in what actually condemns the folk.
NOT the books, but the book - rather, that is what is not written in the book. The name.
I didn't participate in the "infant" thread, and really it doesn't make any difference, it is God's decision and He doesn't allow us privileged information about that topic.
If all the children that were slain when the Hebrews entered the land are in Heaven, that is His right. If they are not, that is His right.
If a child dies, it is God's authority in the matter of eternity.
We are not to make judgement of salvation upon anyone - that is not given to the believer by God.
It is total speculation by those who would proclaim that a child is or isn't in heaven, a speculation that isn't given for humankind to know.
God is just. Whatever He has decided is just.