Again an absence of evidence argument.
The latest argument is that Josephus and Luke shared source material or Josephus used Luke’s gospel as a source. Dr Goldberg provides textural evidence.
I thought so based on carbon dating but now think it is probably authentic based on alternative dating methods, pollen tests, blood type matching the sudarium, and the make up of the image itself. Also both the sudarium and shroud are mentioned in the gospel of John.
Read it yourself and see if you can really assign the story to the people of Israel. In the past Rabbi’s believed Isaiah 53 was Messianic. There are hundreds of prophecies in the OT that matches one individual. If you look at Isaiah 53, 61, 6, 7, 9 they all match one individual in the writings and the gospels who is known as the arm of the Lord in Isaiah 53.
Here is one of the Messianic Jewish arguments you might find interesting.
https://jewsforjesus.org/learn/whos-the-subject-of-isaiah-53