You obviously did not read my original post because I deal with John 15 in it. So I will repost it again because it will help you understand that passaged:
John 15:1-7
15:1 "I am the true vine, and My Father is the vinedresser. 2 Every branch in Me that does not bear fruit He takes away;[/QUOTE
I am only going to limit my responce to Jn 15:2 and apostacy. That does not mean that I have not read all your post nor does it mean that I agree with the rest of your post.
1 Cor 5:1 It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles — that a man has his father's wife! 2 And you are puffed up, and have not rather mourned, that he who has done this deed might be taken away from among you. 3 For I indeed, as absent in body but present in spirit, have already judged (as though I were present) him who has so done this deed. 4 In the name of our Lord Jesus Christ, when you are gathered together, along with my spirit, with the power of our Lord Jesus Christ, 5 deliver such a one to Satan for the destruction of the flesh, that his spirit may be saved in the day of the Lord Jesus.
NKJV
Paul is saying that if the person did not repent of his sin that he would die in his sin and be taken to Heaven. Paul is speaking of a sin so vile that even gentiles think its bad. But yet God would still take him to heaven. So in Jn 15:2 when God takes someone away they are called to heaven. The same thing happened in Acts chapter 5 to Ananias and Sapphira. They were living to the flesh and died. They were believers and could not continue to live in sin.
APOSTASY Defection from the faith.
(from International Standard Bible Encyclopedia, revised edition, Copyright © 1979 by Wm. B. Eerdmans Publishing Co. All rights reserved.)
When Jesus was speaking about BHS he was talking to His 11 disciples. Old covenant people were saved by the same crucifixion that we are. Abraham saw Jesus' day and rejoiced. What other day causes a sinner more joy, yet sadness, than the day that allows us access to heaven. Old covenant people knew when they were saved. David asked that the joy of his salvation be restored. So the 11 met the criteria in Chapter 6 of Heb. They had tasted the goodness of salvation. They had became partakers of the Holy Spirit (as had David and many others in the Old Testament). After walking with Jesus for 3 yrs they had tasted the good word of God as no one else had. They had been given the powers of the age to come to heal, cast out demons etc.
So Apostacy is to quit believing in Jesus and it is the only unforgivable sin. That is what the entire book of Hebrews is about. Jews that wanted to return to the Livitical system. Becoming entangled in the sins of the world by believing that inferior priests and inferior blood could do the job whereas Jesus' sacrifice didn't do the job.
Heb 10:26 For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries.
NKJV
If you reject Jesus after accepting God's gifts, there is no other sacrifice left. Your telling God that you tried it and found that its no good. You are trampling on the best God has to offer.