Psalm 22 is of course the Psalm quoted by Jesus on the Cross. The despondent beginning is quoted but the Psalm has a positive conclusion. So the connection to the Crucifixion was drawn Jesus Himself. And this bit about “pierced” versus dug has been known for many centuries, nothing new here.
This chapter was such a problem to the Ashkenazi Rabbi's that they removed it from Scripture. (While the Sephardic Jews kept it in.) Luckily the dead sea scroll's answer the question of who is right. A full text of Isaiah was found and is on prominent display in Israel... and yes Isaiah 53 is right there.
As far as I can tell, the Jews faithfully copied the scripture with extreme precision and faithfulness, except for here...why?