Belz...
Fiend God
The type of evidence that cause most people to believe the shroud is from the 14th century is exactly the same type of evidence that would be acceptable to support a first century (or any other) date. For example, the known provenance of the shroud goes to about the 14th century. The radiocarbon dating of the shroud indicates its manufacture to the 14th century. The type of weave and the size of the loom are consistent with linens made in the 14th century. So anything like this that points to a first century origin would be welcomed for discussion.
I think this is the most concise answer to Jabba's question.
Let's just watch now as he ignores it.