I do not deny that certain men actually killed Yeshua. Nor do I deny that the Jews were accomplices in his death, but that is not the issue. They had no power whatsoever to kill Yeshua. As Yeshua said, he could have prayed for legions of angels to save him, but he didn't because he was voluntarily giving up his life. Our sins did not kill him because he did not have to die for them. He CHOSE to die for them. If he was forced to die by the will of man, you might have a case, but that was not the case. The issue is whether or not every human being's sins killed him.
Acts 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
Acts 2:23 Him, being delivered
by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain:
No one attempted to murder Yeshua, nor was he murdered. He was put to death for crimes they thought, albeit erroneously, he committed.
The first crucifixion was the will of YHWH and Yeshua. The re-crucifying of Hebrews 6:6 is the will of man. Therefore, their sins would crucify him again because Yeshua is not voluntarily submitting to being re-crucified. With all do respect, you need to reexamine your position.
To confess and sacrifice are acts of righteousness. To sin is an act of unrighteousness. Sin does NOT bring forth righteousness, but death. Confession and sacrifice brings forth righteousness.
Romans 3:8 says nothing about THEIR sins killing Yeshua, but that good resulted from their sins. If you continue on in the chapter, we read;
Rom 3:24 Being justified freely by his grace through the redemption that is in Messiah Yeshua:
Rom 3:25 Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
Rom 3:26 To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Yeshua.
Rom 3:27 Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith.
Rom 3:28 Therefore we conclude that a man is justified by faith without the deeds of the law.
Their was no righteousness on our part, through obeying Torah, that led to our being declared righteous. It is all through grace and righteousness of YHWH and Yeshua.