You seem to be missing the logic of Jesus' statements in John 15. He begins chapter 15 with an assertion about the Father.
John 15:1-2 I am the true vine, and My Father is the vinedresser. Every branch in Me that does not bear fruit, He takes away; and every branch that bears fruit, He prunes it so that it may bear more fruit.
Here, Jesus informs us that the Father is the vinedresser and that the Father takes away every branch that does not bear fruit. Logically, then, when a person decides to no longer abide, the Father is the one who cuts him off from Jesus.
Yeah, and? The children are warned to abide in Him or else they will not have confidence (confidence is from obeying God's commands) and will shrink back in shame at His appearance. What happens then? They are thrown in the fire--as Heb 10:38,39 says "My Righteous one will live by faith but if My righteous one shrinks back My soul has no pleasure in him [without faith it is impossible to please God]... unto destruction."
John 15:3 You are already clean because of the word which I have spoken to you.
Here the Eleven are branches that the Father has already pruned, "because of the word (promise) which I have spoken to you." Logically then, the Eleven will never fall away or be cut off the vine because they have assurances from Jesus that they will remain.
Nothing of the sort was said, rather the contingency was given "IF".
Abiding or not abiding aren't the conditions of being cut off; the conditions for being cut off are not bearing fruit. Every branch in Christ that does not bear fruit is taken away.
Bearing fruit is conditioned on abiding in Christ. And according to Paul, abiding in Christ is conditioned on having the Spirit of God and the spirit of Christ. A --> B --> C. Having the Spirit of God leads to abiding and abiding leads to bearing fruit.
Nope, being in Christ is why you are given the Spirit--"because you are sons in Christ, He has sent the Spirit of His Son into your hearts, crying, abba, father"--it's so plain that the branch that abides in Him receives the sap that is in the Vine so that it can bear fruit.
If you continue to refuse to acknowledge this basic truth, I can't help that.
Keeping God's commands is a feature or element of bearing fruit.
"If you remain in Me and My words remain in you, ask whatever you wish, and it will be done for you. This is to My Father’s glory, that you bear much fruit, proving yourselves to be My disciples."
1 John says If we keep His commands we have confidence and we know we receive what ever we ask of God.
As John says "We know that God does not hear sinners but if a man is a worshipper of God God hears him."
The point is, if Jesus assigns glory to God for the outcome, then God is responsible for the outcome. If the outcome depends on the believer, then the believer should get the glory.
God is glorified by His masterful dealing with the Vine and its branches so that it yields tons of fruit.
He knows how to identify branches that stop abiding, and cut them off.
That has nothing to do with the fact that there is a CONTINGENCY presented--"IF you abide".
That isn't what Paul said.
1 Thessalonians 4
3For it is God’s will that you should be holy: You must abstain from sexual immorality;
4each of you must know how to control his own body
a in holiness and honor,
5not in lustful passion like the Gentiles who do not know God;
6and no one should ever violate or exploit his brother in this regard,
b because the Lord will avenge all such acts, as we have already told you and solemnly warned you.
7For God has not called us to impurity, but to holiness.
8Anyone, then, who rejects this command does not reject man but God, the very One who gives you His Holy Spirit.
It may not "jive" with your personal opinion about what Romans 8:1 says, but it does comport with the entirety of Scripture.