What is the 'Faith (belief, trust) of Jesus Christ' that justifies, which is the same as justification by faith or justification by belief?
Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified. Galatians 2:16 KJV

Jehovah is redeeming the soul of His servants; and none of those who trust in Him shall be guilty. Psalms 34:22 KJ3

WHO ON EARTH KEEPS THE FAITH OF JESUS CHRIST? Revelation 14:12

But after certain days, Felix came with Drusilla, his wife, who was a Jewess, and sent for Paul, and heard him concerning the faith in Christ Jesus. Acts 24:24 ASV

For ye are all the children of God by faith in Christ Jesus. Galatians 3:26 KJV

Hearing your faith in Christ Jesus and the love which you have towards all the saints. Colossians 1:4 DRB

For even if, in flesh, I am absent, nevertheless, in spirit, I am with you, rejoicing and observing your order and the stability of your faith in Christ." Colossians 2:5 CLV

The [faith, belief, trust] 'IN' Jesus background verses.

THE UNCODING KEY

(14) And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up;  (15)  that whosoever believeth may in him have eternal life.  (16)  For God so loved the world, that he gave his only begotten Son, that whosoever believeth on him should not perish, but have eternal life.  (17)  For God sent not the Son into the world to judge the world; but that the world should be saved through him. John 3:14-17 ASV

WHAT IS THE FAITH OF JESUS WHICH JUSTIFIES OR WHAT IS JUSTIFICATION BY FAITH? — THE ANSWER

The [faith, belief, trust] 'OF' Jesus background verses.

Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: Romans 3:22 KJV

in the forbearance of God, for a demonstration of his righteousness in the present time; for his being just and justifying the one of belief of Jesus. Romans 3:26 ABP

Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified. Galatians 2:16 KJV

But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe. Galatians 3:22 KJV. [Compare John 3:16].
But [consigned the scripture] the whole under sin, that the promise of belief of Jesus Christ should be given to the ones trusting. Galatians 3:22 ABP

and I should be found in him not having my righteousness, that is of the law, but the one through belief of Christ, the [of God righteousness] unto the belief; Philippians 3:9 ABP

(12) for whoever sinned without the law, without law also shall perish, and whoever sinned in law, through law will be judged." (13) For not the listeners to law are just with God, but the doers of law shall be justified." Romans 2:12-13 CLV

Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus. Revelation 14:12 KJV

JESUS CALLS FOR ONE HOMOGENEOUS FOLD not fragments of thousands flocks

And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice: and they shall become one flock, one shepherd.  John 10:16 ASV

My sheep hear my voice, and I know them, and they follow me:  John 10:27 ASV

Behold, I stand at the door and knock: if any man hear my voice and open the door, I will come in to him, and will sup with him, and he with me.  Revelation 3:20 ASV