Jesus said that he came unto his own (Jews) and they believed him not.
Some of those Jews that were set on crucifying Jesus were born of the Spirit, but refused to believe that Jesus was the Son of God, and their savior. John 12:47, And if any man hear my words, AND BELIEVE NOT, I judge him not, for I came not to judge the WORLD, but to save the WORLD.
The word "world" in this verse is the same world that is in John 3:16,
which, according to Thayer's Greek interpretation, means "pertaining to believers only".
"His own" here means all the Jews, the people of which he was born.
Also, keeping in mind the Jewish mindset and reference points of those to whom Jesus was speaking,
may I suggest that "
world" is in contradistinction to Israel, that Jesus came to save people
from all nations of the world.
May I also suggest that those who denied Christ did not have true faith,
as those in Lk 8:13 did not have true faith, and for the same reason,
they had no
root, they were
not born again, they were just doing "religion." (Mt 7:21-23)
Just as many of God's children who do not understand what Christ did for them on the cross
does not mean that the fact is that
He secured their eternal salvation, without the loss of even one, John 6:39.
I don't think I understand what you are saying here,
for according to Jn 6:39-40, 10:28-29, Jesus loses
none of whom the Father gives him,
and
all whom the Father gives him
will come to Jesus (Jn 6:37),
and
all who come to Jesus and believe in him
will have eternal life (Jn 6:40).
Likewise, according to Jn 10:26, the Jews rejected Christ because they were
not his sheep;
i.e.,
not born again,
History tells us that the first American Indians, before anyone came over to tell them that there is a God, yet some of them are recorded to have believed in the great white Spirit. This indicates to me, that in order to believe this,
they were already born of the Spirit, having not heard of God or his Son.
Peoples from the whole world believe in some kind of god,
but that does not mean rebirth of the Holy Spirit.
Only faith in Jesus Christ is the result of rebirth of the Holy Spirit.