[aMorePerfectUnion]

“Nobody prays to the shroud.”

This you cannot know without being omniscient.

“Nobody thinks that the shroud is god, or a god.”

They apparently believe it is a talisman or has power to bring them closer to God. It has no power.

“The shroud isn’t the image of a false god, at least if you are a Christian. It’s either the image of an ordinary man, or it’s the image of the God-man.”

Any image of any created thing that is set up and prayed to, adored, etc. is an idol.

[piusv]

This you cannot know without being omniscient.

The same way you can not know whether folks "worship" or "idolize" the cloth without being omniscient.

[Wyrd bið ful aræd]

In #5 you say that people idolize it. In #8, in response to "nobody prays to the shroud", you say that we can't know this without being omniscient. So how can YOU know that people idolize it, unless you are omniscient?

"Any image of any created thing that is set up and prayed to, adored, etc. is an idol."

Are you calling Jesus a "created thing"?