The Messiah of Judaic prophecy was to be completely human, born of two human parents,
Not one of your several O.T. verses cited imply a "completely human, born of two human parents." I presume you mean human mortal parents. God is immortal, but he is of no other animal type than human. So, your description is conflicted. God the Father is the literal father of Jesus Christ; Mary, a mortal human daughter of David by several generations is his mother. Joseph, a cousin of Mary, served the role of mortal "father" to Jesus, though contributed not to the genome of Jesus Christ. The blood of Joseph is not in the Christ; not one drop. He is of God's bloodline, being the literal son of the Father, the Holy One of Israel, and Israel's Redeemer, as testified by Genesis, Isaiah, Jeremiah & Ezekiel.
it was the Romans that killed Jesus,
Romans, only because Israel, then, was under Roman rule, and were forbidden by Rome to put anyone to death.That the elders of Israel sought the life of Christ is unquestionable. I will not bash biblical scripture with you. Bo9th O.T prophecy and N.T references abound that the Pharisees sought Christ's death for blasphemy, claiming to be the Son of God.
so he can’t be considered their “rightful king”
I did not say Jesus was King by messianic prophecy. I said he was king because had Rome not ruled over Judea, but Judea had been of their own rule, even through Mary's bloodline, Jesus would have been the rightful King of Judea. It just so happened that Joseph, as well, was of that bloodline. That's the historic bloodline of it all, my friend, accept it, or don't.
He did not fulfill the central theme of Judaic Messianic prophecy,
I did not say he was, then, at the Meridian of time. But he will fulfill that prophecy when he returns. He will be recognized as King of Israel, and of the world. That's a future event, not past. I never said that is Judaic pro[hecy, although it is. They just misunderstand it. Thy will come to accept it in time.