I don't know how to respond. You bring up many things I was not considering. I know Jesus has died for me, the unjust, that He would bring me to God.
If you note the context, it is about the anointed one's **example** of responding to **injustice**. This is not "salvic" but rather "drawing":
1Pe 3:14 But and if ye suffer for righteousness' sake, happy are ye: and be not afraid of their terror, neither be troubled;
1Pe 3:15 But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:
1Pe 3:16 Having a good conscience; that, whereas they speak evil of you, as of evildoers, they may be ashamed that falsely accuse your good conversation in Christ.
1Pe 3:17 For it is better, if the will of God be so, that ye suffer for well doing, than for evil doing.
1Pe 3:18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:
This would be akin to:
Php 2:14 Do all things without murmurings and disputings:
Php 2:15 That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world.
1Co 4:9 For I think that God hath set forth us the apostles last, as it were appointed to death: for we are made a spectacle unto the world, and to angels, and to men.
1Pe 4:12 Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
1Pe 4:13 But rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy.
1Pe 4:14 If ye be reproached for the name of Christ, happy are ye; for the spirit of glory and of God resteth upon you: on their part he is evil spoken of, but on your part he is glorified.
1Pe 4:15 But let none of you suffer as a murderer, or as a thief, or as an evildoer, or as a busybody in other men's matters.
1Pe 4:16 Yet if any man suffer as a Christian, let him not be ashamed; but let him glorify God on this behalf.
Justification is on the basis of faith. For some reason, this simple concept is abhorrent to modern Trinitarians who want everything to center around Jesus and his death. True justification centers around God, and his having raised the man Jesus from among the dead.